Repurposes the gyp scripts for processing native libraries for an apk and use them for a native library (i.e. forwarder).
Additionally, adjusts the forwarder python script to set LD_LIBRARY_PATH when invoking the forwarder.
BUG=158821
Review URL: https://chromiumcodereview.appspot.com/14322004
git-svn-id: http://src.chromium.org/svn/trunk/src/build@194833 4ff67af0-8c30-449e-8e8b-ad334ec8d88c