deqp fails on new version of test suite
Many tests began failing with deqp=0e6f11c852f3:
dEQP-GLES31.functional.shaders.builtin_functions.uniform.findMSBZero.lowp_vertex
ERROR: comparison failed for findMSB(0) == -1
input: 0
result: -16777216
Result comparison failed
cc Lorenzo Dal Col lorenzo@khronosgroup.org