linux: add dependency on <sys/socket.h> to <linux/if.h> in Linux.Network
linux: add dependency on <sys/socket.h> to <linux/if.h> in Linux.Network

https://bugzilla.gnome.org/show_bug.cgi?id=763227

frida/vala,GNOME/vala,frida/vala,GNOME/vala,frida/vala,GNOME/vala,GNOME/vala,frida/vala,frida/vala