linux 386 support; now in same state as darwin 386

(stuck on 8l bug).

R=r
DELTA=349  (342 added, 1 deleted, 6 changed)
OCL=29882
CL=29886

src/lib/syscall/syscall_linux_amd64.go

@@ -6,6 +6,14 @@ package syscall
 
 import "syscall"
 
+//sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, errno int)
+//sys	bind(s int, addr uintptr, addrlen _Socklen) (errno int)
+//sys	connect(s int, addr uintptr, addrlen _Socklen) (errno int)
+//sys	socket(domain int, typ int, proto int) (fd int, errno int)
+//sys	setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int)
+//sys	Listen(s int, n int) (errno int)
+//sys	Shutdown(fd int, how int) (errno int)
+
 func Getpagesize() int {
 	return 4096
 }