Build liblouis_nacl using gyp.

This cl ports the nacl wrapper to the chromium build system and adds local modifications from Chromevox to liblouis. The native library and braille tables are copied to the location in the resources output directory where chromevox can pick them up.

BUG=316353

Review URL: https://codereview.chromium.org/67283007

git-svn-id: http://src.chromium.org/svn/trunk/src/build@237638 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

gyp_chromium

@@ -28,6 +28,7 @@ sys.path.insert(1, os.path.join(chrome_src, 'native_client', 'build'))
 sys.path.insert(1, os.path.join(chrome_src, 'native_client_sdk', 'src',
     'build_tools'))
 sys.path.insert(1, os.path.join(chrome_src, 'remoting', 'tools', 'build'))
+sys.path.insert(1, os.path.join(chrome_src, 'third_party', 'liblouis'))
 sys.path.insert(1, os.path.join(chrome_src, 'third_party', 'WebKit',
     'Source', 'build', 'scripts'))