Skip ExtractAppIntentsMetadata when building with Xcode

There's no need to run this phase, skip it.

(cherry picked from commit b0a8e74)

Author: bnbarham

llbuild.xcodeproj/project.pbxproj

@@ -12054,6 +12054,7 @@
 				LLBUILD_ENABLE_CODE_COVERAGE_eq_ = YES;
 				LLBUILD_ENABLE_CODE_COVERAGE_eq_NO = NO;
 				LLBUILD_ENABLE_CODE_COVERAGE_eq_YES = YES;
+				LM_SKIP_METADATA_EXTRACTION = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				PROJECT_SOURCE_VERSION = "$(PROJECT_SOURCE_VERSION_$(ISEMPTY_$(RC_ProjectSourceVersion)))";
 				PROJECT_SOURCE_VERSION_ = "$(RC_ProjectSourceVersion)";
@@ -12111,6 +12112,7 @@
 				LLBUILD_ENABLE_CODE_COVERAGE_eq_ = YES;
 				LLBUILD_ENABLE_CODE_COVERAGE_eq_NO = NO;
 				LLBUILD_ENABLE_CODE_COVERAGE_eq_YES = YES;
+				LM_SKIP_METADATA_EXTRACTION = YES;
 				PROJECT_SOURCE_VERSION = "$(PROJECT_SOURCE_VERSION_$(ISEMPTY_$(RC_ProjectSourceVersion)))";
 				PROJECT_SOURCE_VERSION_ = "$(RC_ProjectSourceVersion)";
 				PROJECT_SOURCE_VERSION_empty = 9999.99;