Console.assert doesn't exist in the simulator, so this will always re… (#184)

* console.assert doesn't exist in the simulator, so this will always redbox unless the debugger is attached (in which case it runs through chrome which has all the console methods already defined)

* a more proper fix is to check that console has the assert property

Author: HeyImChris

Libraries/polyfills/console.js

@@ -560,7 +560,7 @@ if (global.nativeLoggingHook) {
           // TODO(T43930203): remove this special case once originalConsole.assert properly checks
           // the condition
           if (methodName === 'assert') {
-            if (!arguments[0]) {
+            if (!arguments[0] && originalConsole.hasOwnProperty('assert')) {
               originalConsole.assert(...arguments);
             }
           } else {