gio/gappinfo.c: Don't include unistd.h
gio/gappinfo.c: Don't include unistd.h

Functions from unistd.h seems not to be used in commit 5b77a19, and
unistd.h is not universally available, so don't include it.

endlessm/glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,endlessm/glib,endlessm/glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib