Revert "[OpenCL] Add generic AS to 'this' pointer"

Reverting because the patch broke lldb.

llvm-svn: 348931
diff --git a/clang/lib/Parse/ParseOpenMP.cpp b/clang/lib/Parse/ParseOpenMP.cpp
index 1fb5280..475b20c 100644
--- a/clang/lib/Parse/ParseOpenMP.cpp
+++ b/clang/lib/Parse/ParseOpenMP.cpp
@@ -495,7 +495,7 @@
     Sema &Actions = P.getActions();
 
     // Allow 'this' within late-parsed attributes.
-    ThisScope = new Sema::CXXThisScopeRAII(Actions, RD, Qualifiers(),
+    ThisScope = new Sema::CXXThisScopeRAII(Actions, RD, /*TypeQuals=*/0,
                                            ND && ND->isCXXInstanceMember());
 
     // If the Decl is templatized, add template parameters to scope.