Use the new Triple::getMacOSXVersion function in another place.

I removed support for "*-darwin*-iphoneos" triples, since we now have
iOS listed as a separate OS in the triples.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149455 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed