anv: handle spirv parsing failure
v2: don't leak spec_entries v3: Also switch to VK_ERROR_UNKNOWN when parsing fails Signed-off-by:Lionel Landwerlin <lionel.g.landwerlin@intel.com> Cc: mesa-stable Reviewed-by:
Jason Ekstrand <jason@jlekstrand.net> Part-of: <mesa/mesa!10790> (cherry picked from commit 938e52a6)