Use GLES 3.0 by default
Use GLES 3.0 by default

This only changes the desktop build default, the packaging file
specifies what version of GLES to use every time.

Change-Id: Ic8676b2c7675d4188a5e0445b82a2764a227e475

dalihub/dali-adaptor,dalihub/dali-adaptor,dalihub/dali-adaptor,dalihub/dali-adaptor,dalihub/dali-adaptor