Merge pull request #280 from NativeScript/cankov/resource-and-no-flavors-fail-comma

build.gradle creates include.gradle with an extra comma

Author: Mihail Slavchev

build/project-template-gradle/build.gradle

@@ -260,7 +260,11 @@ task createPluginsConfigFile {
 			println "\t+creating product flavors include.gradle file in $configurationsDir folder..."
 			def flavors = pluginNames.join(",")
 			if(appResExists) {
-				flavors = '"' + appResourcesName + '", ' + flavors
+				if (flavors == '') {
+					flavors = '"' + appResourcesName + '"'
+				} else {
+					flavors = '"' + appResourcesName + '", ' + flavors
+				}
 			}
 			flavorsFile << "android { \n"
 			flavorsFile << "\tflavorDimensions " + flavors + "\n"