Cherry-pick fbe202e. rdar://problem/108176822

    WebKitSwiftOverlay should (once again) include a WebKitAdditions overlay
    https://bugs.webkit.org/show_bug.cgi?id=257046
    rdar://109577606

    Reviewed by Andy Estes.

    Include WebKitAdditionsSwiftOverlay from a well known location.

    * Source/WebKit/SwiftOverlay/WebKitSwiftOverlay.xcodeproj/project.pbxproj:

    Canonical link: https://commits.webkit.org/264278@main
Identifier: 263319.494@safari-7616.1.14.11-branch

Source/WebKit/SwiftOverlay/WebKitSwiftOverlay.xcodeproj/project.pbxproj

@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		516A9BFB2A00A626006C9125 /* WebKitSwiftOverlayAdditions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 516A9BF92A00A626006C9125 /* WebKitSwiftOverlayAdditions.swift */; };
 		7D20070C22F4EB72008DF640 /* libswiftWebKit.dylib in Frameworks */ = {isa = PBXBuildFile; fileRef = 7D20067522F2652E008DF640 /* libswiftWebKit.dylib */; };
 		7D20071B22F4ECCA008DF640 /* libswiftWebKit.dylib in Frameworks */ = {isa = PBXBuildFile; fileRef = 7D20068722F26721008DF640 /* libswiftWebKit.dylib */; };
 		B3A5D38F23F78F5400B17727 /* WebKitTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = B3A5D38823F78F5400B17727 /* WebKitTests.swift */; };
@@ -37,6 +38,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		516A9BF92A00A626006C9125 /* WebKitSwiftOverlayAdditions.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = WebKitSwiftOverlayAdditions.swift; path = usr/local/include/WebKitAdditions/WebKitSwiftOverlayAdditions.swift; sourceTree = BUILT_PRODUCTS_DIR; };
 		7D20067522F2652E008DF640 /* libswiftWebKit.dylib */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.dylib"; includeInIndex = 0; path = libswiftWebKit.dylib; sourceTree = BUILT_PRODUCTS_DIR; };
 		7D20068722F26721008DF640 /* libswiftWebKit.dylib */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.dylib"; includeInIndex = 0; path = libswiftWebKit.dylib; sourceTree = BUILT_PRODUCTS_DIR; };
 		7D20070722F4EB72008DF640 /* WebKitSwiftOverlayTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = WebKitSwiftOverlayTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -94,6 +96,7 @@
 				B3A5D39923F790E100B17727 /* install-swiftmodules.sh */,
 				B3B8FEEE2502BAA0006172CA /* ObjectiveCBlockConversions.swift */,
 				B3A5D39123F790DB00B17727 /* WebKitSwiftOverlay.swift */,
+				516A9BF92A00A626006C9125 /* WebKitSwiftOverlayAdditions.swift */,
 			);
 			name = "Swift Overlay";
 			path = SwiftOverlay;
@@ -354,6 +357,7 @@
 			files = (
 				B3B8FEEF2502BAA0006172CA /* ObjectiveCBlockConversions.swift in Sources */,
 				B3A5D39223F790DB00B17727 /* WebKitSwiftOverlay.swift in Sources */,
+				516A9BFA2A00A626006C9125 /* WebKitSwiftOverlayAdditions.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -363,6 +367,7 @@
 			files = (
 				B3B8FEF02502BAA0006172CA /* ObjectiveCBlockConversions.swift in Sources */,
 				B3A5D39323F790DB00B17727 /* WebKitSwiftOverlay.swift in Sources */,
+				516A9BFB2A00A626006C9125 /* WebKitSwiftOverlayAdditions.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};