POSIX binding: add sigaction function
POSIX binding: add sigaction function

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