Replace a fake enum class with the real thing.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208943 91177308-0d34-0410-b5e6-96231b3b80d8
Push implicitly-declared allocation functions into the IdResolver. Otherwise,
declaration merging in modules is unable to find them and we get bogus errors
and even crashes.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208944 91177308-0d34-0410-b5e6-96231b3b80d8