Fixed build --forDevice command after prepare changes

Author: Tsvetan Raikov

lib/commands/build.ts

@@ -5,7 +5,8 @@ export class BuildCommandBase {
 	executeCore(args: string[], buildConfig?: IBuildConfig): IFuture<void> {
 		return (() => {
 			let platform = args[0].toLowerCase();
-			this.$platformService.prepareAndBuild(platform, buildConfig, true).wait();
+			this.$platformService.preparePlatform(platform, true).wait();
+			this.$platformService.buildPlatform(platform, buildConfig).wait();
 			if(this.$options.copyTo) {
 				this.$platformService.copyLastOutput(platform, this.$options.copyTo, {isForDevice: this.$options.forDevice}).wait();
 			}

lib/services/platform-service.ts

@@ -367,7 +367,7 @@ export class PlatformService implements IPlatformService {
 	}
 
 	private getBuildOutputPath(platform: string, platformData: IPlatformData, buildConfig?: IBuildConfig): string {
-		let buildForDevice = buildConfig ? buildConfig.buildForDevice : false;
+		let buildForDevice = buildConfig ? buildConfig.buildForDevice : this.$options.forDevice;
 		if (platform === this.$devicePlatformsConstants.iOS.toLowerCase()) {
 			return buildForDevice ? platformData.deviceBuildOutputPath : platformData.emulatorBuildOutputPath;
 		}