[CMake] [Apple Cache] Set CLANG_VENDOR_UTI for Apple builds

This is just a minor update to the Apple packaging configuration.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@278849 91177308-0d34-0410-b5e6-96231b3b80d8

cmake/caches/Apple-stage2.cmake

@@ -3,6 +3,7 @@
 
 set(LLVM_TARGETS_TO_BUILD X86 ARM AArch64 CACHE STRING "") 
 set(PACKAGE_VENDOR Apple CACHE STRING "")
+set(CLANG_VENDOR_UTI com.apple.clang CACHE STRING "")
 set(LLVM_INCLUDE_EXAMPLES OFF CACHE BOOL "")
 set(LLVM_INCLUDE_DOCS OFF CACHE BOOL "")
 set(LLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD OFF CACHE BOOL "")