st/glsl_to_tgsi: attach image to correct instruction for samples

This fixes a crash (but not the test):
GL45-CTS.shader_texture_image_samples_tests.functional_test

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Dave Airlie <airlied@redhat.com>
1 file changed