cmd/dist: disable internal linking tests on Alpine

Updates #18243

Change-Id: I1fe0af65dbd52c3e8e0a245e4cbbdfca100971b4
Reviewed-on: https://go-review.googlesource.com/41759
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

src/cmd/dist/test.go

@@ -750,6 +750,10 @@ func (t *tester) internalLink() bool {
 	if t.goarch == "arm64" || t.goarch == "mips64" || t.goarch == "mips64le" || t.goarch == "mips" || t.goarch == "mipsle" {
 		return false
 	}
+	if isAlpineLinux() {
+		// Issue 18243.
+		return false
+	}
 	return true
 }