piglit: Add header <piglit/gl_wrap.h>

A convenience header that includes the actual OpenGL headers, which are
chosen according to the macro definitions USE_OPENGL and USE_OPENGL_ES2.

Note: This belongs to a series that adds GLES2 support to Piglit.
Signed-off-by: Chad Versace <chad.versace@intel.com>
3 files changed