Added a Pandora build

|BUILD CONFIGURATION|
[Pandora]
* Added a Pandora build configuration

|SOURCE|
[Common/Window]
* X11 window parameters are guarded by an #if defined brace for Linux
[Pandora/PandoraEGLWindow]
* A 32-bit OGLES2 window is created
[Pandora/PandoraGame]
* An EGL-only window is used