cmd/dist: don't run internal link tests on arm or darwin/arm64

Change-Id: I373a64fc30dee804d99e106d4627b780e1846917
Reviewed-on: https://go-review.googlesource.com/16999
Reviewed-by: David Crawshaw <crawshaw@golang.org>

src/cmd/dist/test.go

@@ -370,6 +370,16 @@ func (t *tester) registerTests() {
 			break
 		}
 
+		// ARM libgcc may be Thumb, which internal linking does not support.
+		if t.goarch == "arm" {
+			break
+		}
+
+		// Darwin ARM64 fails with internal linking.
+		if t.goos == "darwin" && t.goarch == "arm64" {
+			break
+		}
+
 		pkg := pkg
 		t.tests = append(t.tests, distTest{
 			name:    "nolibgcc:" + pkg,