Use new JavaScriptCore from npm (facebook#22231)

Summary:
Pull Request resolved: facebook#22231

- Use clang instead of the deprecated gcc
- Use libc++ instead of the deprecated gnustl
- Updated gradle and android plugin version
- Fixed missing arch in local-cli template
- `clean` task should now always succeed
- `clean` task deletes build artifacts
- No need to specify buildToolsVersion. It's derived.
- Elvis operator for more readable code
Pull Request resolved: facebook#22263

Reviewed By: hramos

Differential Revision: D13004499

Pulled By: DanielZlotin

fbshipit-source-id: da54bb744cedb4c6f3bda590f8c25d0ad64086ef

ReactAndroid/src/main/jni/Application.mk

@@ -19,11 +19,11 @@ APP_MK_DIR := $(dir $(lastword $(MAKEFILE_LIST)))
 #   etc.) are defined inside build.gradle.
 NDK_MODULE_PATH := $(APP_MK_DIR)$(HOST_DIRSEP)$(THIRD_PARTY_NDK_DIR)$(HOST_DIRSEP)$(REACT_COMMON_DIR)$(HOST_DIRSEP)$(APP_MK_DIR)first-party$(HOST_DIRSEP)$(REACT_SRC_DIR)
 
-APP_STL := gnustl_shared
+APP_STL := c++_shared
 
 # Make sure every shared lib includes a .note.gnu.build-id header
 APP_CFLAGS := -Wall -Werror
 APP_CPPFLAGS := -std=c++1y
 APP_LDFLAGS := -Wl,--build-id
 
-NDK_TOOLCHAIN_VERSION := 4.9
+NDK_TOOLCHAIN_VERSION := clang

ReactAndroid/src/main/jni/react/jni/Android.mk

@@ -12,7 +12,7 @@ LOCAL_C_INCLUDES := $(LOCAL_PATH)
 #   ./../ == react
 LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../..
 
-LOCAL_CFLAGS += -fexceptions -frtti
+LOCAL_CFLAGS += -fexceptions -frtti -Wno-unused-lambda-capture
 
 LOCAL_LDLIBS += -landroid
 

ReactAndroid/src/main/jni/third-party/folly/Android.mk

@@ -26,6 +26,7 @@ FOLLY_FLAGS := \
   -DFOLLY_NO_CONFIG=1 \
   -DFOLLY_HAVE_CLOCK_GETTIME=1 \
   -DFOLLY_HAVE_MEMRCHR=1 \
+  -DFOLLY_USE_LIBCPP=1
 
 # If APP_PLATFORM in Application.mk targets android-23 above, please comment this line.
 # NDK uses GNU style stderror_r() after API 23.

ReactAndroid/src/main/jni/third-party/glog/Android.mk

@@ -23,7 +23,8 @@ LOCAL_CFLAGS += \
   -g \
   -O2 \
   -D_START_GOOGLE_NAMESPACE_="namespace google {" \
-  -D_END_GOOGLE_NAMESPACE_="}"
+  -D_END_GOOGLE_NAMESPACE_="}" \
+  -DHAVE_PREAD=1
 
 
 LOCAL_MODULE := glog

ReactCommon/cxxreact/Android.mk

@@ -12,7 +12,7 @@ LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)
 LOCAL_CFLAGS := \
   -DLOG_TAG=\"ReactNative\"
 
-LOCAL_CFLAGS += -fexceptions -frtti
+LOCAL_CFLAGS += -fexceptions -frtti -Wno-unused-lambda-capture
 
 LOCAL_STATIC_LIBRARIES := boost
 LOCAL_SHARED_LIBRARIES := jsinspector libfolly_json glog