crypto/x509: skip tests not made for darwin/arm

Change-Id: I8b18dc840425b72d7172a35cb0ba004bd156492d
Reviewed-on: https://go-review.googlesource.com/6252Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>

src/crypto/x509/root_darwin_test.go

@@ -4,9 +4,16 @@
 
 package x509
 
-import "testing"
+import (
+	"runtime"
+	"testing"
+)
 
 func TestSystemRoots(t *testing.T) {
+	if runtime.GOARCH == "arm" {
+		t.Skipf("skipping on %s/%s", runtime.GOOS, runtime.GOARCH)
+	}
+
 	sysRoots := systemRootsPool()         // actual system roots
 	execRoots, err := execSecurityRoots() // non-cgo roots
 

src/crypto/x509/x509_test.go

@@ -829,6 +829,10 @@ func TestImports(t *testing.T) {
 	switch runtime.GOOS {
 	case "android", "nacl":
 		t.Skipf("skipping on %s", runtime.GOOS)
+	case "darwin":
+		if runtime.GOARCH == "arm" {
+			t.Skipf("skipping on %s/%s", runtime.GOOS, runtime.GOARCH)
+		}
 	}
 
 	if err := exec.Command("go", "run", "x509_test_import.go").Run(); err != nil {