Fix return type of glGetAttribLocation and glGetUniformLocation

from int to GLint.

See:
   http://www.khronos.org/opengles/sdk/docs/man/xhtml/glGetAttribLocation.xml
   http://www.khronos.org/opengles/sdk/docs/man/xhtml/glGetUniformLocation.xml

Change-Id: I4a9f8e9e34b8c3cca239ae84bfe8f3cdfd94802a
9 files changed