Right now the two functions being added are just wrappers, but this will
allow us in the future to support FreeBSD and Linux's system calls that
do the equivalent of forkfd, but have slightly different semantics in
the actual getting of the information from the file descriptor.
See-Also: https://lkml.org/lkml/2015/3/12/1044
See-Also: http://www.freebsd.org/cgi/man.cgi?query=pdfork
Change-Id: Ia0aac2f09e9245339951ffff13c94acb5f4ff204
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2dbe90c248