Don't pass -ibuiltininc, which is used only by the driver, to CC1

[ahatanak]

Summary

This fixes a fallout from 5b77e752dcd073846b89559d6c0e1a7699e58615.

[MaskRay]

clang/lib/Driver/ToolChains/Clang.cpp

1309

Typo: No need

clang/lib/Driver/ToolChains/Clang.cpp

if (A->getOption().matches(options::OPT_include) &&
       // the toolchain itself after the resource dir is inserted in the right
       // search order.
       // Do not claim the argument so that the use of the argument does not
       // silently go unnoticed on toolchains which do not honour the option.
       continue;
     } else if (A->getOption().matches(options::OPT_stdlibxx_isystem)) {
       // Translated to -internal-isystem by the driver, no need to pass to cc1.
       continue;
+    } else if (A->getOption().matches(options::OPT_ibuiltininc)) {
+      // This is used only by the driver. No no need to pass to cc1.
+      continue;
     }
 
     // Not translated, render as usual.
     A->claim();
     A->render(Args, CmdArgs);
   }
 
   Args.AddAllArgs(CmdArgs,

clang/test/Driver/darwin-header-search-system.cpp

 // RUN:     -ccc-install-dir %S/Inputs/basic_darwin_toolchain_no_libcxx/usr/bin \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \
 // RUN:     -isysroot %S/Inputs/basic_darwin_sdk_usr_and_usr_local \
 // RUN:     -nostdinc -nobuiltininc -ibuiltininc \
 // RUN:   | FileCheck -DSYSROOT=%S/Inputs/basic_darwin_sdk_usr_and_usr_local \
 // RUN:               -DRESOURCE=%S/Inputs/resource_dir \
 // RUN:               --check-prefix=CHECK-NOSTDINC-BUILTINC %s
 // CHECK-NOSTDINC-BUILTINC: "-cc1"
+// CHECK-NOSTDINC-BUILTINC-NOT: "-ibuiltininc"
 // CHECK-NOSTDINC-BUILTINC-NOT: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-NOSTDINC-BUILTINC: "-internal-isystem" "[[RESOURCE]]/include"
 // CHECK-NOSTDINC-BUILTINC-NOT: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 
 // RUN: %clang -### %s -fsyntax-only 2>&1 \
 // RUN:     --target=x86_64-apple-darwin \
 // RUN:     -ccc-install-dir %S/Inputs/basic_darwin_toolchain_no_libcxx/usr/bin \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \