emulator/opengl: Fix GPU emulation library crash on Windows.

The definitions of two EGL translator functions were missing
EGLAPI / EGLAPIENTRY macros. On Windows, these enforces the
__stdcall procedure call modifier, which changes the way the
stack pointer is modified on function exit.

Without this patch, a call to these function will result in
a corrupted stack pointer in the caller, quickly followed by
a random crash.

BUG=15402623

Change-Id: Ia0f7ebef29e1252086fb59ebf2e6f907c2a69487
1 file changed