cmd/dist: fix internal linking check for mips64le

Fix mips64le build.

Change-Id: Icf1b4901655463f582b49054a88edfb06ad6c676
Reviewed-on: https://go-review.googlesource.com/29281
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

src/cmd/dist/test.go

@@ -712,7 +712,7 @@ func (t *tester) internalLink() bool {
 	// Internally linking cgo is incomplete on some architectures.
 	// https://golang.org/issue/10373
 	// https://golang.org/issue/14449
-	if t.goarch == "arm64" || t.goarch == "mips64" {
+	if t.goarch == "arm64" || t.goarch == "mips64" || t.goarch == "mips64le" {
 		return false
 	}
 	return true