Create a new #include "Support/..." directory structure to move things
from "llvm/Support/..." that are not llvm dependant.

Move files and fix #includes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1400 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/ParserInternals.h b/lib/AsmParser/ParserInternals.h
index 0f25f54..76052fa 100644
--- a/lib/AsmParser/ParserInternals.h
+++ b/lib/AsmParser/ParserInternals.h
@@ -18,7 +18,7 @@
 #include "llvm/Method.h"
 #include "llvm/DerivedTypes.h"
 #include "llvm/Assembly/Parser.h"
-#include "llvm/Support/StringExtras.h"
+#include "Support/StringExtras.h"
 
 class Module;