Fix clang build

Change-Id: I5336ac347123671a18401121c5f001c8f7caf54d
diff --git a/libs/hwui/FontRenderer.cpp b/libs/hwui/FontRenderer.cpp
index fd2bdc6..6bef7c7 100644
--- a/libs/hwui/FontRenderer.cpp
+++ b/libs/hwui/FontRenderer.cpp
@@ -508,8 +508,10 @@
 void FontRenderer::issueDrawCommand(Vector<CacheTexture*>& cacheTextures) {
     if (!mFunctor) return;
 
+#if !USE_GLOPS
     Caches& caches = mFunctor->renderer->getCaches();
     RenderState& renderState = mFunctor->renderer->renderState();
+#endif
 
     bool first = true;
     bool forceRebind = false;