posix: Fix termios and fd_set related functions
posix: Fix termios and fd_set related functions

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