Switch this API to StringRef.

llvm-svn: 76554
diff --git a/llvm/lib/Target/MSIL/MSILWriter.h b/llvm/lib/Target/MSIL/MSILWriter.h
index 0d0d0ff..5dab0e8 100644
--- a/llvm/lib/Target/MSIL/MSILWriter.h
+++ b/llvm/lib/Target/MSIL/MSILWriter.h
@@ -252,7 +252,7 @@
 
     const char* getLibraryName(const GlobalVariable* GV); 
     
-    const char* getLibraryForSymbol(const char* Name, bool isFunction,
+    const char* getLibraryForSymbol(const StringRef &Name, bool isFunction,
                                     unsigned CallingConv);
 
     void printExternals();