YaGL: modify native configs enumerator in OS X

YaGL: modify native configs enumerator in OS X

Some apps want to get the config without multisampling.
Currently, YaGL module provides only one config with multisampling attribute.
So the apps fail because they can not find the matched config in OS X.
So add one more pixelformat without multisampling attribute & add related tasks.

Change-Id: Ibf41243110d9212b9a62e4006dfa6f9c4356291f
Signed-off-by: Jinhyung Jo <jinhyung.jo@samsung.com>
(cherry picked from commit 2c9de13bde79583b1f6dfe78fc16f3cfcec99973)