Don't print the filename twice in file-not-found errors.

llvm-svn: 110179
diff --git a/llvm/lib/AsmParser/Parser.cpp b/llvm/lib/AsmParser/Parser.cpp
index e511cbe..e7cef9b 100644
--- a/llvm/lib/AsmParser/Parser.cpp
+++ b/llvm/lib/AsmParser/Parser.cpp
@@ -45,8 +45,7 @@
   MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
   if (F == 0) {
     Err = SMDiagnostic(Filename,
-                       "Could not open input file '" + Filename + "': " +
-                       ErrorStr);
+                       "Could not open input file: " + ErrorStr);
     return 0;
   }