include os/posix/ in source tar

Author: mdavidsaver

setup.cfg

@@ -33,6 +33,7 @@ softioc =
     # Include the OS specific files in the sdist, even
     # if not packages by setup.py (as we only build sdist on one arch)
     iocStats/devIocStats/os/default/*
+    iocStats/devIocStats/os/posix/*
     iocStats/devIocStats/os/Darwin/*
     iocStats/devIocStats/os/WIN32/*
     iocStats/devIocStats/os/Linux/*