Implementation of fcntl() to both Darwin and Glibc overlays. Ported …#413

Merged

gribozavr merged 2 commits intoswiftlang:masterfrom

billabt:fcntl-extension

Dec 12, 2015

Commits on Dec 11, 2015

Implementation of fcntl() to both Darwin and Glibc overlays. Ported open(), openat() and sem_open() from Darwin to Glibc. Added tests for new fcntl functionality.
Bill Abt
committed
Minor formatting changes to conform to conventions.
Bill Abt
committed