virglrenderer: bump ops + compare string limits up to 512 bytes
Fixes: tests/spec/arb_compute_shader/execution/basic-local-id-atomic.shader_test
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Fixes: tests/spec/arb_compute_shader/execution/basic-local-id-atomic.shader_test