Disable multisampled windows on older drivers.

Multisampled windows require additional driver support that was added in
version 0.2 of the platform surface interface.

On older drivers, don't set EGL_WINDOW_BIT on any multisampled
EGLConfigs.

Merge pull request #16 from psruthikNV/sruthik/tegradisp_drm_support

egl-x11: Add support for tegradisp-drm

Merge pull request #20 from kbrenneman/fix-timeline-point-error

Fix the error reporting in WaitTimelinePoint.

Merge pull request #14 from kbrenneman/add-eglQueryDisplayAttrib

Add a hook function for eglQueryDisplayAttrib.

Merge pull request #9 from kbrenneman/check-duplicate-native-surface

Check for duplicate native drawables