lima: Add stencil support
This re-enables and fixes support for stencil buffer.
It fixes 365 stencil related deqp tests. All tests that use INCR, INCR_WRAR, DECR and DECR_WRAP as a stencil op still fail, but they also fail with the blob, so we may ignore that for now. We still have dEQP-GLES2.functional.depth_stencil_clear.depth_stencil_masked failing, which is strange because it's the only one out of the depth_stencil_clear.* set.
Signed-off-by: Andreas Baierl ichgeh@imkreisrum.de