Protobuf: added runTests task to build.gradle in Kotlin <-> Java Tests project

proto/compiler/google/src/google/protobuf/compiler/kotlin/protoc-tests/kt_java_tests/build.gradle

@@ -13,19 +13,25 @@ buildscript {
 apply plugin: 'java'
 apply plugin: 'kotlin'
 apply plugin: 'idea'
+apply plugin: 'application'
+
+mainClassName = 'kt_java_tests.MainKt'
 
 repositories {
     mavenCentral()
 }
 
+task runTests() {
+}
+
+runTests.dependsOn run
+
 dependencies {
     compile "org.jetbrains.kotlin:kotlin-stdlib:1.0.1"
     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     // https://mvnrepository.com/artifact/com.google.protobuf/protobuf-java
     compile group: 'com.google.protobuf', name: 'protobuf-java', version: '3.0.0'
-    compile "org.jetbrains.kotlin:kotlin-js-library:$kotlin_version"
-    compile files ('../../../../../../../build/protokot-runtime.jar')
-
+    compile files ('../../../../../../../../build/protokot-runtime.jar')
 }
 
 sourceSets {