Add LOCAL_MODULE_TAGS := optional

Change-Id: I292f6297b06f97360c15884677057d624e73fbf6
diff --git a/lib/Bitcode/Reader/Android.mk b/lib/Bitcode/Reader/Android.mk
index 165b0d0..02fc617 100644
--- a/lib/Bitcode/Reader/Android.mk
+++ b/lib/Bitcode/Reader/Android.mk
@@ -12,6 +12,8 @@
 
 LOCAL_MODULE:= libLLVMBitReader
 
+LOCAL_MODULE_TAGS := optional
+
 include $(LLVM_HOST_BUILD_MK)
 include $(LLVM_GEN_INTRINSICS_MK)
 include $(BUILD_HOST_STATIC_LIBRARY)
@@ -24,6 +26,8 @@
 
 LOCAL_MODULE:= libLLVMBitReader
 
+LOCAL_MODULE_TAGS := optional
+
 include $(LLVM_DEVICE_BUILD_MK)
 include $(LLVM_GEN_INTRINSICS_MK)
 include $(BUILD_STATIC_LIBRARY)