Print cocoa pods warnings with labels

Includes
+ A hack for silencing irrelevant warning messages from xcode's linker when running `pod install` with cocoa pods version 0.38.2 and Mac OS El Capitan. There is a [github issue](CocoaPods/CocoaPods#4302) with more information available

Author: rosen-vladimirov

lib/common

@@ -517,16 +517,19 @@ export class IOSProjectService extends projectServiceBaseLib.PlatformProjectServ
 			let childProcess = this.$childProcess.spawnFromEvent(podTool,  ["install"], "close", { cwd: this.platformData.projectRoot, stdio: ['pipe', process.stdout, 'pipe'] }).wait();
 			if (childProcess.stderr) {
 				let warnings = childProcess.stderr.match(/(\u001b\[(?:\d*;){0,5}\d*m[\s\S]+?\u001b\[(?:\d*;){0,5}\d*m)|(\[!\].*?\n)/g);
-				let result = _.reduce(warnings, (result: string, warning: string) => {
-					return result + `[Warning]${warning.replace("\n", "")}${os.EOL}`.yellow;
-				}, "");
-				this.$logger.info(result);
+				_.each(warnings, (warning: string) => {
+					this.$logger.warnWithLabel(warning.replace("\n", ""));
+				});
 
-				let errors = childProcess.stderr;
+				// HACK for silencing irrelevant linking warnings when pod installing on
+				// El Capitan with cocoa pods version 0.38.2
+				// Reference https://github.com/CocoaPods/CocoaPods/issues/4302
+				let errors = childProcess.stderr.replace(/dyld: warning, LC_RPATH @executable_path.*?@executable_path/g, "");
 				_.each(warnings, warning => {
 					errors = errors.replace(warning, "");
 				});
-				if(errors) {
+
+				if(errors.trim()) {
 					this.$errors.failWithoutHelp(`Pod install command failed. Error output: ${errors}`);
 				}
 			}

lib/services/ios-project-service.ts

@@ -11,6 +11,7 @@ export class LoggerStub implements ILogger {
 	fatal(...args: string[]): void {}
 	error(...args: string[]): void {}
 	warn(...args: string[]): void {}
+	warnWithLabel(...args: string[]): void {}
 	info(...args: string[]): void {}
 	debug(...args: string[]): void {}
 	trace(...args: string[]): void {}