The qplatformdefs.h for OpenBSD included an undefine of
_POSIX_THREAD_SAFE_FUNCTIONS because of (at the time) missing
implementations of the required _r() functions. After checking these
functions http://www.unix.org/whitepapers/reentrant.html
against the OpenBSD man pages http://man.openbsd.org/OpenBSD-4.4/cat3/getpwuid_r.0
they are all complete with OpenBSD 4.4 released in 2008. As
OpenBSD only supports the current and the last release before (5.8 and
5.9 now), it is safe to assume that this undefine can go away now
for sure.
Change-Id: I341bcae77d1bd7249ac3fdeaefce9c5eb595eca7
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>