Android: add libglog prebuilt .so definition

Summary:
So that it's easier for C++ targets to depend on libglog.so for debugging purpose.

Changelog: [Internal]

Differential Revision: D24382033

fbshipit-source-id: 00ad6b2365d571583d6d1aaa40fac2c96974abf1

ReactAndroid/Android-prebuilt.mk

@@ -40,8 +40,7 @@ LOCAL_SRC_FILES := $(REACT_NDK_EXPORT_DIR)/$(TARGET_ARCH_ABI)/libfolly_json.so
 LOCAL_EXPORT_C_INCLUDES := \
   $(THIRD_PARTY_NDK_DIR)/boost/boost_1_63_0 \
   $(THIRD_PARTY_NDK_DIR)/double-conversion \
-  $(THIRD_PARTY_NDK_DIR)/folly \
-  $(THIRD_PARTY_NDK_DIR)/glog/exported
+  $(THIRD_PARTY_NDK_DIR)/folly
 # Note: Sync with folly/Android.mk.
 FOLLY_FLAGS := \
   -DFOLLY_NO_CONFIG=1 \
@@ -61,6 +60,14 @@ LOCAL_SRC_FILES := $(REACT_NDK_EXPORT_DIR)/$(TARGET_ARCH_ABI)/libfolly_futures.s
 LOCAL_SHARED_LIBRARIES := liblibfolly_json
 include $(PREBUILT_SHARED_LIBRARY)
 
+# glog
+include $(CLEAR_VARS)
+LOCAL_MODULE := glog
+LOCAL_SRC_FILES := $(REACT_NDK_EXPORT_DIR)/$(TARGET_ARCH_ABI)/libglog.so
+LOCAL_EXPORT_C_INCLUDES := $(THIRD_PARTY_NDK_DIR)/glog/exported
+LOCAL_SHARED_LIBRARIES := libglog
+include $(PREBUILT_SHARED_LIBRARY)
+
 # react_nativemodule_core
 include $(CLEAR_VARS)
 LOCAL_MODULE := react_nativemodule_core