Fix module tags on stagefright software decoders.

Change-Id: I8b3f60760e1e8eaa0f66eb6c7ce3df8e425638fb
related-to-bug: 4427361
diff --git a/media/libstagefright/codecs/m4v_h263/dec/Android.mk b/media/libstagefright/codecs/m4v_h263/dec/Android.mk
index 65b642c..f1bec08 100644
--- a/media/libstagefright/codecs/m4v_h263/dec/Android.mk
+++ b/media/libstagefright/codecs/m4v_h263/dec/Android.mk
@@ -71,6 +71,6 @@
         libstagefright libstagefright_omx libstagefright_foundation libutils
 
 LOCAL_MODULE := libstagefright_soft_mpeg4dec
-LOCAL_MODULE_TAGS := eng
+LOCAL_MODULE_TAGS := optional
 
 include $(BUILD_SHARED_LIBRARY)