move TGSourceMgr class out of TableGen into libsupport.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73842 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/TGParser.h b/utils/TableGen/TGParser.h
index 3af467d..c618708 100644
--- a/utils/TableGen/TGParser.h
+++ b/utils/TableGen/TGParser.h
@@ -15,7 +15,7 @@
 #define TGPARSER_H
 
 #include "TGLexer.h"
-#include "TGSourceMgr.h"
+#include "llvm/Support/SourceMgr.h"
 #include <map>
 
 namespace llvm {