fix: tns debug ios should work on device

Currently `tns debug ios` hangs when executed for device. The problem is that we pass `"waitForDebugger": false` to ios-device-lib binary, which can parse only strings. The value `false` is boolean, not string, so ios-device-lib binary crashes, but CLI does not understand this and hangs.
Fix this by ensuring we pass waitForDebugger as string.

Author: rosen-vladimirov

lib/common/mobile/ios/device/ios-application-manager.ts

@@ -102,7 +102,7 @@ export class IOSApplicationManager extends ApplicationManagerBase {
 	}
 
 	private async runApplicationCore(appData: Mobile.IStartApplicationData): Promise<void> {
-		const waitForDebugger = appData.waitForDebugger && appData.waitForDebugger.toString();
+		const waitForDebugger = (!!appData.waitForDebugger).toString();
 		await this.$iosDeviceOperations.start([{ deviceId: this.device.deviceInfo.identifier, appId: appData.appId, ddi: this.$options.ddi, waitForDebugger }]);
 	}