cmd/internal/ld: R_TLS_LE is fine on Darwin too

Sorry about this.

Fixes #10575

Change-Id: I2de23be68e7d822d182e5a0d6a00c607448d861e
Reviewed-on: https://go-review.googlesource.com/9341Reviewed-by: Minux Ma <minux@golang.org>

src/cmd/internal/ld/data.go

@@ -412,7 +412,7 @@ func relocsym(s *LSym) {
 				break
 			}
 
-			if Iself || Ctxt.Headtype == obj.Hplan9 {
+			if Iself || Ctxt.Headtype == obj.Hplan9 || Ctxt.Headtype == obj.Hdarwin {
 				o = int64(Ctxt.Tlsoffset) + r.Add
 			} else if Ctxt.Headtype == obj.Hwindows {
 				o = r.Add