cmd/addr2line: skip test on android

LGTM=minux
R=golang-codereviews, minux
CC=golang-codereviews
https://golang.org/cl/104600043

src/cmd/addr2line/addr2line_test.go

@@ -92,8 +92,9 @@ func testAddr2Line(t *testing.T, exepath, addr string) {
 
 // This is line 93. The test depends on that.
 func TestAddr2Line(t *testing.T) {
-	if runtime.GOOS == "nacl" {
-		t.Skip("skipping on nacl")
+	switch runtime.GOOS {
+	case "nacl", "android":
+		t.Skipf("skipping on %s", runtime.GOOS)
 	}
 
 	syms := loadSyms(t)