add default option -errfmt for sunpro in Makefile.master and uts/Makefile.uts
when using sunstudio as a shadow compiler, it would be nice to get both
warning: and error: messages instead of just warning: messages.
-errfmt, which defaults to
-errfmt=error should be allowed
as well as be on by default in the gate.
It also aids debugging to be able to demote
-errwarn=%all with some
-errwarn=no%<tag> options, although in general there should not be any
turned on by default in the gate (with the possible exception of
attached is a patch: