threads/69020: pthreads library leaks _gc_mutex

[maxim at FreeBSD.org]

Synopsis: pthreads library leaks _gc_mutex

State-Changed-From-To: suspended->closed
State-Changed-By: maxim
State-Changed-When: Fri Jul 29 14:28:00 UTC 2011
State-Changed-Why: 
ibc_r has been disconnected from the build more than five years
already.  There is no libc_r support in all modern branches.
No libc_r -- no problem reports.

Let me know if you think this PR should stay open.

http://www.freebsd.org/cgi/query-pr.cgi?pr=69020