Fixed: Confusing report for a problem with CocoaPods during installation (#2409)

Author: tzraikov

lib/node-package-manager.ts

@@ -126,7 +126,10 @@ export class NodePackageManager implements INodePackageManager {
 	private getFlagsString(config: any, asArray: boolean) : any{
 		let array:Array<string> = [];
 		for(let flag in config) {
-			if(config[flag]) {
+			if (flag === "global") {
+				array.push(`--${flag}`);
+				array.push(`${config[flag]}`);
+			} else if(config[flag]) {
 				if(flag==="dist-tags" || flag==="versions") {
 					array.push(` ${flag}`);
 					continue;

lib/services/doctor-service.ts

@@ -187,7 +187,7 @@ class DoctorService implements IDoctorService {
 		let spinner = new clui.Spinner("Installing iOS runtime.");
 		try {
 			spinner.start();
-			this.$npm.install("tns-ios", projDir, { "ignore-scripts": true, production: true, save: true}).wait();
+			this.$npm.install("tns-ios", projDir, { global: false, "ignore-scripts": true, production: true, save: true}).wait();
 			spinner.stop();
 			let iosDir = path.join(projDir, "node_modules", "tns-ios", "framework");
 			this.$fs.writeFile(