mesa: Refuse to bind image uniforms using glUniform in GLES.

The GLES 3.1 spec removed support for updating the image unit bound to
an image uniform using glUniform1i() calls.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

src/mesa/main/uniform_query.cpp

@@ -677,9 +677,11 @@ _mesa_uniform(struct gl_context *ctx, struct gl_shader_program *shProg,
       match = (basicType != GLSL_TYPE_DOUBLE);
       break;
    case GLSL_TYPE_SAMPLER:
-   case GLSL_TYPE_IMAGE:
       match = (basicType == GLSL_TYPE_INT);
       break;
+   case GLSL_TYPE_IMAGE:
+      match = (basicType == GLSL_TYPE_INT && _mesa_is_desktop_gl(ctx));
+      break;
    default:
       match = (basicType == uni->type->base_type);
       break;