meson: fix GLES3/gl31.h install

This is a typo, gl32.h is installed twice.

Reported-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
1 file changed