[PATCH] [mips] Add support for 'ZC' inline assembly memory constraint.

[Simon Atanasyan]

================
Comment at: lib/Basic/Targets.cpp:5936
@@ +5935,3 @@
+      }
+      break;
+    }
----------------
What does return this function if 'Z' is not followed by 'C'?

```
case 'Z':
  if (Name[1] != 'C')
    return false;
  Info.setAllowsMemory();
  Name++; // Skip over 'Z'.
  return true;
```

http://reviews.llvm.org/D8449

EMAIL PREFERENCES
  http://reviews.llvm.org/settings/panel/emailpreferences/