Add USE_GCC_RUNTIME to databases/postgresql92
Add USE_GCC_RUNTIME to security/openssh
Add USE_GCC_RUNTIME to x11/py-Tk
Ensure _FILE_OFFSET_BITS=64 for net/libfetch
Convert devel/py-readline to multiarch.
Convert x11/py-Tk to multiarch.
Merge branch 'joyent/feature/gccruntime/2012Q4' into joyent/release/2012Q4_multiarch

Conflicts:
	databases/postgresql92/Makefile.common
Merge branch 'joyent/feature/miscfix/2012Q4' into joyent/release/2012Q4_multiarch
Merge branch 'joyent/feature/multiarch/2012Q4' into joyent/release/2012Q4_multiarch