[llvm-rc] Include StringMap.h insteadof StringSet.h (NFC)

ResourceScriptStmt.h uses StringMap, not StringSet.

Author: kazutakahirata

llvm/tools/llvm-rc/ResourceScriptStmt.h

@@ -17,7 +17,7 @@
 #include "ResourceVisitor.h"
 
 #include "llvm/ADT/BitVector.h"
-#include "llvm/ADT/StringSet.h"
+#include "llvm/ADT/StringMap.h"
 
 namespace llvm {
 namespace rc {