Add missing ccGLServerState to CCNode.pkg.

Without this missing enum the resuling cpp file would generate
an unused function warning.

Also, remove the duplication between build_macosx.xml and build.xml.
They only differed in single property.  Instead use build.sh, which
should work on all UNIXs, no just maxosx.
Add new port: Native Client
Merge pull request #2076 from sbc100/cocos_nacl

Native Client port