Craig Small 75bd099420 library: check not undef SIGLOST
sig.c had this odd logic where on non-Hurd systems it would undefine
SIGLOST. Fine for Hurd or amd64 Linux systems. Bad for a sparc which
has SIGLOST defined *and* is not Hurd.

Just check its defined, its much simpler.
2018-05-03 21:06:05 +10:00
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