Don't detect library kind for pure JVM projects

Also require .kjsm to detect JS libraries; don't detect jars containing only .js files as JS libraries #KT-19717 Fixed

Author: yole

idea/idea-analysis/src/org/jetbrains/kotlin/idea/framework/LibraryKinds.kt

@@ -84,7 +84,7 @@ private fun detectLibraryKindFromJarContents(jarRoot: VirtualFile): PersistentLi
  when (file.extension) {
  "class" -> false
 
- "js", "kjsm" -> {
+ "kjsm" -> {
  result = JSLibraryKind
  false
  }

idea/idea-gradle/src/org/jetbrains/kotlin/idea/configuration/KotlinGradleSourceSetDataService.kt

@@ -109,7 +109,7 @@ class KotlinGradleLibraryDataService : AbstractProjectDataService<LibraryData, V
  if (toImport.isEmpty()) return
  val projectDataNode = toImport.first().parent!! as DataNode<ProjectData>
  val moduleDataNodes = projectDataNode.children.filter { it.data is ModuleData } as List<DataNode<ModuleData>>
- if (moduleDataNodes.any { detectPlatformByPlugin(it) != null}) {
+ if (moduleDataNodes.any { detectPlatformByPlugin(it)?.takeIf { it !is TargetPlatformKind.Jvm } != null }) {
  for (libraryDataNode in toImport) {
  val ideLibrary = modelsProvider.findIdeLibrary(libraryDataNode.data) ?: continue