sys_proc_create() can dup FGRPs (XCC)

9ns FGRPs were always being duped for all processes (fork and create), but VFS
ones were only duped for forks.  Now both 9ns and VFS behave the same way, and
you can pass a flag to have your entire FGRP, minus the CLOEXECs, duped from a
parent to a child on creation.  This happens implicitly in a fork().

Eventually, we'll have another dup call, say dup11345385(), that will allow a
parent to "dup2" specific FDs to its child.

Reinstall your kernel headers, or just:

$ cp kern/include/ros/procinfo.h \
  XCC_ROOT/install-x86_64-ros-gcc/x86_64-ros/sys-include/ros/procinfo.h