posix: fix qsort binding
posix: fix qsort binding

tjol/vala-tjol,Jc2k/vala,rvu95/vala,frida/vala,jessevdk/vala,Jc2k/vala,spidermonkdust/vala,kamanashisroy/aroop,GNOME/vala,playya/vala,Distrotech/vala,GNOME/vala,kamanashisroy/aroop,kamanashisroy/aroop,GNOME/vala,severinh/vala,phako/vala,frida/vala,flobrosch/vala-fixes,themiwi/vala,flobrosch/vala-fixes,themiwi/vala,frida/vala,xdave/pvala,playya/vala,themiwi/vala,jessevdk/vala,flobrosch/vala-fixes,tjol/vala-tjol,frida/vala,severinh/vala,spidermonkdust/vala,frida/vala,severinh/vala,playya/vala,Distrotech/vala,tjol/vala-tjol,rvu95/vala,spidermonkdust/vala,phako/vala,Distrotech/vala,jessevdk/vala,GNOME/vala,rvu95/vala