Include Swift lib in LIBRARY_SEARCH_PATHS

Summary:
changelog: Fix Xcode 13 build error in HelloWorld template

Including `usr/lib/swift` fixes error:
{F642876047}

Reviewed By: p-sun

Differential Revision: D30301799

fbshipit-source-id: b93eb51ec5dd929ddc46574fc11bc89934eadeaf

Author: sammy-SC

template/ios/HelloWorld.xcodeproj/project.pbxproj

@@ -438,6 +438,7 @@
 					"\"$(TOOLCHAIN_DIR)/usr/lib/swift/$(PLATFORM_NAME)\"",
 					"\"$(TOOLCHAIN_DIR)/usr/lib/swift-5.0/$(PLATFORM_NAME)\"",
 					"\"$(inherited)\"",
+					"\"$(SDKROOT)/usr/lib/swift\"",
 				);
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -495,6 +496,7 @@
 					"\"$(TOOLCHAIN_DIR)/usr/lib/swift/$(PLATFORM_NAME)\"",
 					"\"$(TOOLCHAIN_DIR)/usr/lib/swift-5.0/$(PLATFORM_NAME)\"",
 					"\"$(inherited)\"",
+					"\"$(SDKROOT)/usr/lib/swift\"",
 				);
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;