Copy stdlib-js source map during JPS build

Original commit: 7edb352aeb

jps/jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/build/KotlinJpsBuildTest.kt

@@ -305,6 +305,9 @@ class KotlinJpsBuildTest : AbstractKotlinJpsBuildTestCase() {
         val sourceMapContent = File(getOutputDir(PROJECT_NAME), "$PROJECT_NAME.js.map").readText()
         val expectedPath = "prefix-dir/pkg/test1.kt"
         assertTrue("Source map file should contain relative path ($expectedPath)", sourceMapContent.contains("\"$expectedPath\""))
+
+        val librarySourceMapFile = File(getOutputDir(PROJECT_NAME), "lib/kotlin.js.map")
+        assertTrue("Source map for stdlib should be copied to $librarySourceMapFile", librarySourceMapFile.exists())
     }
 
     fun testKotlinJavaScriptProjectWithTwoModules() {

jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilder.kt

@@ -679,11 +679,13 @@ class KotlinBuilder : ModuleLevelBuilder(BuilderCategory.SOURCE_PROCESSOR) {
         val representativeTarget = chunk.representativeTarget()
         val outputDir = KotlinBuilderModuleScriptGenerator.getOutputDirSafe(representativeTarget)
         val compilerSettings = JpsKotlinCompilerSettings.getCompilerSettings(representativeTarget.module)
+        val k2jsCompilerSettings = JpsKotlinCompilerSettings.getK2JsCompilerArguments(representativeTarget.module)
         if (compilerSettings.copyJsLibraryFiles) {
             val outputLibraryRuntimeDirectory = File(outputDir, compilerSettings.outputDirectoryForJsLibraryFiles).absolutePath
             val libraryFilesToCopy = arrayListOf<String>()
             JpsJsModuleUtils.getLibraryFiles(representativeTarget, libraryFilesToCopy)
-            JsLibraryUtils.copyJsFilesFromLibraries(libraryFilesToCopy, outputLibraryRuntimeDirectory)
+            JsLibraryUtils.copyJsFilesFromLibraries(libraryFilesToCopy, outputLibraryRuntimeDirectory,
+                                                    copySourceMap = k2jsCompilerSettings.sourceMap)
         }
     }