am 27ad1ef8: Add a new sample named "hello-gl2" that shows how to call OGL ES 2.0 functions from native code through JNI.

Merge commit '27ad1ef820ef0fd8bfe47b440330975a3931b9c2' into eclair-mr2

* commit '27ad1ef820ef0fd8bfe47b440330975a3931b9c2':
  Add a new sample named "hello-gl2" that shows how to call OGL ES 2.0 functions