posix: add gethostname(2)
posix: add gethostname(2)

tjol/vala-tjol,jessevdk/vala,GNOME/vala,kamanashisroy/aroop,severinh/vala,jessevdk/vala,jessevdk/vala,severinh/vala,spidermonkdust/vala,Distrotech/vala,GNOME/vala,frida/vala,rvu95/vala,kamanashisroy/aroop,severinh/vala,frida/vala,Distrotech/vala,frida/vala,Distrotech/vala,playya/vala,spidermonkdust/vala,frida/vala,playya/vala,flobrosch/vala-fixes,xdave/pvala,tjol/vala-tjol,kamanashisroy/aroop,GNOME/vala,rvu95/vala,tjol/vala-tjol,spidermonkdust/vala,rvu95/vala,flobrosch/vala-fixes,flobrosch/vala-fixes,GNOME/vala,playya/vala,frida/vala