Specify a NODE_MODULES_DIR inside the NDK config for the Android template
Specify a NODE_MODULES_DIR inside the NDK config for the Android template

Summary:
I'm just adding a macro passing the NODE_MODULES_DIR to the NDK build.
This will make easier to import external libraries for our users.

Changelog:
[Internal] [Changed] - Specify a NODE_MODULES_DIR inside the NDK config for the Android template

Reviewed By: cipolleschi

Differential Revision: D35451821

fbshipit-source-id: 5d79359a1610f2de4ec2d50a78b4c930458185d8

janicduplessis/react-native,javache/react-native,janicduplessis/react-native,facebook/react-native,facebook/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,facebook/react-native,facebook/react-native,janicduplessis/react-native,javache/react-native,facebook/react-native,javache/react-native,janicduplessis/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,facebook/react-native,javache/react-native,javache/react-native,janicduplessis/react-native,javache/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native