[driver] Clang doesn't support -mkernel/-fapple-kext for i386, so it's 
automatically invoking llvm-gcc's cc1plus, which doesn't support all options
supported by Clang.  Therefore, filter out unsupported options.
rdar://9964354


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@137842 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed