posix.vapi: Fix type of mode argumentent on creat function
posix.vapi: Fix type of mode argumentent on creat function

severinh/vala,lovebug356/vala,GNOME/vala,rvu95/vala,tjol/vala-tjol,flobrosch/vala-fixes,spidermonkdust/vala,rvu95/vala,kamanashisroy/aroop,frida/vala,phako/vala,themiwi/vala,flobrosch/vala-fixes,frida/vala,playya/vala,frida/vala,severinh/vala,rvu95/vala,jessevdk/vala,tjol/vala-tjol,Distrotech/vala,jessevdk/vala,kamanashisroy/aroop,GNOME/vala,Jc2k/vala,themiwi/vala,spidermonkdust/vala,jessevdk/vala,GNOME/vala,lovebug356/vala,playya/vala,spidermonkdust/vala,playya/vala,Jc2k/vala,Distrotech/vala,xdave/pvala,phako/vala,frida/vala,tjol/vala-tjol,GNOME/vala,Distrotech/vala,themiwi/vala,frida/vala,kamanashisroy/aroop,flobrosch/vala-fixes,severinh/vala