Rename AddReadAttrs to FunctionAttrs. This is related to Duncan's patch r61525.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@61534 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/Backend.cpp b/Driver/Backend.cpp
index 58c0d67..328f080 100644
--- a/Driver/Backend.cpp
+++ b/Driver/Backend.cpp
@@ -257,7 +257,7 @@
     PM->add(createCFGSimplificationPass());       // Clean up after IPCP & DAE
     if (CompileOpts.UnitAtATime) {
       PM->add(createPruneEHPass());               // Remove dead EH info
-      PM->add(createAddReadAttrsPass());          // Set readonly/readnone attrs
+      PM->add(createFunctionAttrsPass());         // Set readonly/readnone attrs
     }
     if (CompileOpts.InlineFunctions)
       PM->add(createFunctionInliningPass());      // Inline small functions