Log Message:
build the library thread-aware, i.e. use <pthread.h> but do not
link against libpthread. (It doesn't create threads, just uses
locking.) This seems to be wanted by some applications, eg vlc
issues a warning on startup (with no visible consequences afaict,
but anyway).
I hope this works for other OSes too. If not, we should probably
add support for these cases to mk/pthread.bl3.mk.
bump PKGREV