egl: Initialize current thread management on demand.

Current thread management was initialized in _eglInitGlobals, which is
called only in eglGetDisplay.  Since EGL does not require eglGetDisplay
to be called first, the initialization is better to be done on demand.

_eglFiniCurrent is removed, as it is not called at all.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
3 files changed