Comment out TestRawInput

This test is causing too many Travis failures. Will re-enable when https://github.com/google/grumpy/issues/282 is addressed.

runtime/builtin_types_test.go

@@ -471,7 +471,8 @@ func TestBuiltinSetAttr(t *testing.T) {
 	}
 }
 
-func TestRawInput(t *testing.T) {
+// TODO(corona10): Re-enable once #282 is addressed.
+/*func TestRawInput(t *testing.T) {
 	fun := wrapFuncForTest(func(f *Frame, s string, args ...*Object) (*Object, *BaseException) {
 		// Create a fake Stdin for input test.
 		stdinFile, w, err := os.Pipe()
@@ -523,7 +524,7 @@ func TestRawInput(t *testing.T) {
 		}
 	}
 
-}
+}*/
 
 func newTestIndexObject(index int) *Object {
 	indexType := newTestClass("Index", []*Type{ObjectType}, newStringDict(map[string]*Object{