Remove prepending of '$' to module names.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135775 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTReader.cpp b/lib/Serialization/ASTReader.cpp
index ecb24e7..424d631 100644
--- a/lib/Serialization/ASTReader.cpp
+++ b/lib/Serialization/ASTReader.cpp
@@ -2643,8 +2643,8 @@
   else
     FirstInSource = &F;
   F.Loaders.push_back(Prev);
-  // A non-module AST file's module name is $filename.
-  Modules["$" + FileName.str()] = &F;
+
+  Modules[FileName.str()] = &F;
 
   // Set the AST file name.
   F.FileName = FileName;