unix: fix //sys decl after CL 548795

CL 548795 mistakenly changed one of the //sys declaration to "// sys"
while resolving a merge conflict.

For golang/go#64710

Change-Id: I029b461fd3ca7b76f3bd23b3343f7e63c4bb09f3
Reviewed-on: https://go-review.googlesource.com/c/sys/+/688857
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

unix/syscall_darwin.go

diff --git a/unix/syscall_darwin.go b/unix/syscall_darwin.go
index 798f61a..1013b0a 100644
--- a/unix/syscall_darwin.go
+++ b/unix/syscall_darwin.go
@@ -602,7 +602,6 @@
 	return
 }
 
-// sys	connectx(fd int, endpoints *SaEndpoints, associd SaeAssocID, flags uint32, iov []Iovec, n *uintptr, connid *SaeConnID) (err error)
 const minIovec = 8
 
 func Readv(fd int, iovs [][]byte) (n int, err error) {
@@ -746,6 +745,7 @@
 	return actualMaj > maj || actualMaj == maj && (actualMin > min || actualMin == min && actualPatch >= patch)
 }
 
+//sys	connectx(fd int, endpoints *SaEndpoints, associd SaeAssocID, flags uint32, iov []Iovec, n *uintptr, connid *SaeConnID) (err error)
 //sys	sendfile(infd int, outfd int, offset int64, len *int64, hdtr unsafe.Pointer, flags int) (err error)
 
 //sys	shmat(id int, addr uintptr, flag int) (ret uintptr, err error)