fix(serve): await connectivity on specified host, not localhost (#3444)

Author: rdlabo

packages/@ionic/cli-utils/src/lib/project/angular/serve.ts

@@ -104,7 +104,7 @@ ${chalk.cyan('[1]')}: ${chalk.bold('https://github.com/angular/angular-cli/wiki/
       this.e.log.info(`Waiting for connectivity with ${chalk.green(program)}...`);
     }, 5000);
 
-    await isHostConnectable('localhost', ngPort);
+    await isHostConnectable(options.address, ngPort);
     clearInterval(interval);
 
     return {

packages/@ionic/cli-utils/src/lib/project/ionic-angular/serve.ts

@@ -126,7 +126,7 @@ export class IonicAngularServeRunner extends ServeRunner<IonicAngularServeOption
       this.e.log.info(`Waiting for connectivity with ${chalk.green(program)}...`);
     }, 5000);
 
-    await isHostConnectable('localhost', port);
+    await isHostConnectable(options.address, port);
     clearInterval(interval);
 
     return {

packages/@ionic/cli-utils/src/lib/project/ionic1/serve.ts

@@ -105,7 +105,7 @@ export class Ionic1ServeRunner extends ServeRunner<Ionic1ServeOptions> {
       this.e.log.info(`Waiting for connectivity with ${chalk.green(program)}...`);
     }, 5000);
 
-    await isHostConnectable('localhost', port);
+    await isHostConnectable(options.address, port);
     clearInterval(interval);
 
     return {