Don't ignore the const attribute - we even have CG support for that. Do ignore the malloc attribute however.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64538 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/AttributeList.cpp b/lib/Parse/AttributeList.cpp
index 3528699..5b70a59 100644
--- a/lib/Parse/AttributeList.cpp
+++ b/lib/Parse/AttributeList.cpp
@@ -60,11 +60,11 @@
     break;
   case 5:
     if (!memcmp(Str, "alias", 5)) return AT_alias;
-    if (!memcmp(Str, "const", 5)) return IgnoredAttribute;  // FIXME!
+    if (!memcmp(Str, "const", 5)) return AT_const;
     break;
   case 6:
     if (!memcmp(Str, "packed", 6)) return AT_packed;
-    if (!memcmp(Str, "malloc", 6)) return AT_malloc;
+    if (!memcmp(Str, "malloc", 6)) return IgnoredAttribute;
     if (!memcmp(Str, "format", 6)) return AT_format;
     if (!memcmp(Str, "unused", 6)) return AT_unused;
     if (!memcmp(Str, "blocks", 6)) return AT_blocks;