Add YGEnums to fix gradle build

Summary:
Attempt to fix CircleCI build by adding YGEnums to the yoga gradle file
Closes facebook#13296

Differential Revision: D4827856

Pulled By: ericvicenti

fbshipit-source-id: cb03af77919c811d06352fbe0b77084e97d2e6c1

Author: Eric Vicenti

ReactCommon/yoga/Android.mk

@@ -6,6 +6,7 @@ LOCAL_MODULE := yogacore
 
 LOCAL_SRC_FILES := \
   yoga/Yoga.c \
+  yoga/YGEnums.c \
   yoga/YGNodeList.c
 
 LOCAL_C_INCLUDES := $(LOCAL_PATH)