Add description for Kotlin gradle plugin

idea/src/META-INF/gradle.xml

@@ -4,5 +4,6 @@
   </extensions>
   <extensions defaultExtensionNs="org.jetbrains.plugins.gradle">
       <frameworkSupport implementation="org.jetbrains.kotlin.idea.configuration.GradleKotlinJavaFrameworkSupportProvider"/>
+      <pluginDescriptions implementation="org.jetbrains.kotlin.idea.configuration.KotlinGradlePluginDescription"/>
   </extensions>
 </idea-plugin>

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinGradlePluginDescription.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.idea.configuration
+
+import org.jetbrains.plugins.gradle.codeInsight.GradlePluginDescriptionsExtension
+
+class KotlinGradlePluginDescription : GradlePluginDescriptionsExtension {
+    override fun getPluginDescriptions(): Map<String, String> =
+        mapOf("kotlin" to "Adds support for building Kotlin projects")
+}