Fix pbo-getteximage to check for GL_ARB_texture_cube_map_array
i965 doesn't support this feature on the older Gen4-5 GPUs, so the test was throwing GL errors and failing probes. Just skip the cube map array subtest if the feature isn't there.
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i965 doesn't support this feature on the older Gen4-5 GPUs, so the test was throwing GL errors and failing probes. Just skip the cube map array subtest if the feature isn't there.