Driver: Fix thinkos that prevented Clang from picking the right deployment
target when both {MACOSX,IPHONEOS}_DEPLOYMENT_TARGET were set.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99055 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed