[driver] When using the -mfpmath= option, add an error message when trying to 
enable neonfp on a CPU that doesn't support NEON.
rdar://11108618


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154061 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed