Fix qlstephen project warnings

Part of this was originally part of macvim-dev#1178 but we removed the qlstephen
parts to prepare for eventual removal. Couple years later and we haven't
removed qlstephen yet, so just fix the warnings for now first.

From macvim-dev#1178:

- Fix the project localization name from English to "en"
- Set ALWAYS_SEARCH_USER_PATHS to "NO"

Also:

- Remove the hard-coded macOS 10.8 deployment target which actually
  isn't supported by modern Xcode versions. Just unset it as our CI
  usually sets that for us.
- The post-build script is now tagged properly to always run.
- Ignore all deprecation warnings. These were exposed because we removed
  the 10.8 deployment target. Since we aren't going to be fixing them
  (we are either just going to grab newer versions from upsteram, or
  delete this), there's no point in having these warnings.

src/MacVim/qlstephen/QuickLookStephen.xcodeproj/project.pbxproj

@@ -24,13 +24,13 @@
 		0107ABFC15C76F2900C65F1A /* QLSFileAttributes.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = QLSFileAttributes.h; sourceTree = "<group>"; };
 		0107ABFD15C76F2900C65F1A /* QLSFileAttributes.m */ = {isa = PBXFileReference; fileEncoding = 4; indentWidth = 2; lastKnownFileType = sourcecode.c.objc; path = QLSFileAttributes.m; sourceTree = "<group>"; tabWidth = 2; usesTabs = 0; };
 		0149EB3D15F2E9A3003AB298 /* libicucore.dylib */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.dylib"; name = libicucore.dylib; path = usr/lib/libicucore.dylib; sourceTree = SDKROOT; };
-		089C167EFE841241C02AAC07 /* English */ = {isa = PBXFileReference; fileEncoding = 10; lastKnownFileType = text.plist.strings; name = English; path = English.lproj/InfoPlist.strings; sourceTree = "<group>"; };
 		08FB77B6FE84183AC02AAC07 /* main.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = main.c; sourceTree = "<group>"; };
 		0AA1909FFE8422F4C02AAC07 /* CoreFoundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreFoundation.framework; path = /System/Library/Frameworks/CoreFoundation.framework; sourceTree = "<absolute>"; };
 		2C05A19B06CAA52B00D84F6F /* GeneratePreviewForURL.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratePreviewForURL.m; sourceTree = "<group>"; usesTabs = 0; };
 		61E3BCFA0870B4F2002186A0 /* GenerateThumbnailForURL.m */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.objc; path = GenerateThumbnailForURL.m; sourceTree = "<group>"; };
 		8D576316048677EA00EA77CD /* QLStephen.qlgenerator */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = QLStephen.qlgenerator; sourceTree = BUILT_PRODUCTS_DIR; };
 		8D576317048677EA00EA77CD /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist; path = Info.plist; sourceTree = "<group>"; };
+		95241CDF2573D584001E3711 /* en */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = en; path = en.lproj/InfoPlist.strings; sourceTree = "<group>"; };
 		AE02F6EA0EDDFA6400CBA17D /* Cocoa.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Cocoa.framework; path = /System/Library/Frameworks/Cocoa.framework; sourceTree = "<absolute>"; };
 		C86B05260671AA6E00DD9006 /* CoreServices.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreServices.framework; path = /System/Library/Frameworks/CoreServices.framework; sourceTree = "<absolute>"; };
 		F28CFBFC0A3EC0AF000ABFF5 /* ApplicationServices.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = ApplicationServices.framework; path = /System/Library/Frameworks/ApplicationServices.framework; sourceTree = "<absolute>"; };
@@ -138,10 +138,11 @@
 			};
 			buildConfigurationList = 2CA326220896AD4900168862 /* Build configuration list for PBXProject "QuickLookStephen" */;
 			compatibilityVersion = "Xcode 3.2";
-			developmentRegion = English;
+			developmentRegion = en;
 			hasScannedForEncodings = 1;
 			knownRegions = (
 				en,
+				Base,
 			);
 			mainGroup = 089C166AFE841209C02AAC07 /* QuickLookStephen */;
 			projectDirPath = "";
@@ -166,6 +167,7 @@
 /* Begin PBXShellScriptBuildPhase section */
 		698210201CC62DD000504BBF /* ShellScript */ = {
 			isa = PBXShellScriptBuildPhase;
+			alwaysOutOfDate = 1;
 			buildActionMask = 2147483647;
 			files = (
 			);
@@ -197,7 +199,7 @@
 		8D5B49A704867FD3000E48DA /* InfoPlist.strings */ = {
 			isa = PBXVariantGroup;
 			children = (
-				089C167EFE841241C02AAC07 /* English */,
+				95241CDF2573D584001E3711 /* en */,
 			);
 			name = InfoPlist.strings;
 			sourceTree = "<group>";
@@ -240,12 +242,13 @@
 		2CA326230896AD4900168862 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
 				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_PREPROCESSOR_DEFINITIONS = "RKL_PREPEND_TO_METHODS=rkl_";
+				GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS = NO;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.8;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
 				WARNING_CFLAGS = (
@@ -259,11 +262,12 @@
 		2CA326240896AD4900168862 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_PREPROCESSOR_DEFINITIONS = "RKL_PREPEND_TO_METHODS=rkl_";
+				GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS = NO;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.8;
 				SDKROOT = macosx;
 				WARNING_CFLAGS = (
 					"-Wextra",