Source code was assuming that llvm-config.h would be included somehow but
up to r247253 that added #include "llvm/Support/Compiler.h" to StringRef.h
the config file was not actually included. The inclusion of llvm-config.h
caused a change of behaviour in tools/clang/test/Frontend/source-col-map.c:
previously it would output the original UTF-8 but now it outputs <U+03B1>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247409
91177308-0d34-0410-b5e6-
96231b3b80d8
+#include "llvm/Config/llvm-config.h"
#include "llvm/Support/Locale.h"
#include "llvm/Support/Unicode.h"