runtime: Disable crash tests that runs go tool.

From-SVN: r192735

libgo/go/runtime/crash_test.go

@@ -7,7 +7,7 @@ package runtime_test
 import (
 	"io/ioutil"
 	"os"
-	"os/exec"
+	// "os/exec"
 	"path/filepath"
 	"runtime"
 	"testing"
@@ -50,6 +50,9 @@ func testCrashHandler(t *testing.T, ct *crashTest) {
 	}
 	f.Close()
 
+	/*
+		 gccgo does not have a go command.
+
 		got, err := exec.Command("go", "run", src).CombinedOutput()
 		if err != nil {
 			t.Fatalf("program exited with error: %v\n%v", err, string(got))
@@ -58,6 +61,8 @@ func testCrashHandler(t *testing.T, ct *crashTest) {
 		if string(got) != string(want) {
 			t.Fatalf("expected %q, but got %q", string(want), string(got))
 		}
+
+	*/
 }
 
 func TestCrashHandler(t *testing.T) {