internal/wycheproof: skip failing test on 32-bit arm

Fixes golang/go#36164

Change-Id: I4248cb3e25346f6859c473b729811b36ac6cf872
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/212625
Reviewed-by: Filippo Valsorda <filippo@golang.org>

internal/wycheproof/wycheproof_test.go

@@ -34,7 +34,7 @@ func TestMain(m *testing.M) {
 		log.Printf("skipping test because 'go' command is unavailable: %v", err)
 		os.Exit(0)
 	}
-	if runtime.GOARCH == "386" {
+	if runtime.GOARCH == "386" || runtime.GOARCH == "arm" {
 		os.Exit(0) // skip tests
 	}