Converted sigprocmask and rt_sigprocmask.

While doing so, fixed bug #93328, by using the right sized types in
sigprocmask(), and converting them as necessary.  Added a regression test for
it too.

(partly) MERGE TO STABLE


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3013 a5019735-40e9-0310-863c-91ae7b9d1cf9
8 files changed