Fix #if condition

src/csharp/Intel/Iced.UnitTests/Intel/FormatterTests/MnemonicOptionsTestsReader.cs

@@ -21,7 +21,7 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-#if !NO_MASM
+#if !NO_GAS || !NO_INTEL || !NO_MASM || !NO_NASM
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;