python-posix-ipc: new package

This patch is based on the original new pkg patch submitted last Jan
and is part of the "Patchwork oldest patches cleanup #5".  It combines
the original "[1/2]/[2/2] new package: python-posix_ipc" patch files.

Signed-off-by: Matt Weber <mlweber1@rockwellcollins.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>