ext_gpu_shader4: add some tests for ext without GLSL 1.30
This required a bumped XML as the VertexAttribIPointerEXT wasn't correctly set in the old XML, making dispatch fail.
This modifies texture integer test to handle gpu_shader4 This modifies the texelFetch and textureSize tests to add support for gpu_shader4 Copies some vertex id tests from glsl 1.30 Adds some initial texture_buffer_object support tests. (this might need more work).
Edited by Dave Airlie