__CONSTANT_CFSTRINGS__ should be defined even in C mode, otherwise the CFSTR
won't expand to the builtin.  This fixes rdar://6248329



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57164 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed