egl: Fix EGL_EXT_platform_xcb name string to match the registry
The EGL_EXT_platform_xcb extension was defined in Khronos but the name EGL_MESA_platform_xcb is returned by Mesa. This change allows to be consistent and aligned with the EGL registry: see https://github.com/KhronosGroup/EGL-Registry/issues/159
Signed-off-by: Nicolas Caramelli caramelli.devel@gmail.com
Edited by Nicolas Caramelli