[K/N][build] Add common sources setting to Konan plugin

Used for stdlib build

kotlin-native/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/konan/KonanCompileConfig.kt

@@ -56,6 +56,10 @@ abstract class KonanCompileConfig<T: KonanCompileTask>(name: String,
     override fun commonSourceSets(vararg sourceSetNames: String) = tasks().forEach { it.configure { commonSourceSets(*sourceSetNames) } }
     override fun enableMultiplatform(flag: Boolean) = tasks().forEach { it.configure { enableMultiplatform(flag) } }
 
+    override fun commonSrcDir(dir: Any) = tasks().forEach { it.configure { commonSrcDir(dir) } }
+    override fun commonSrcFiles(vararg files: Any) = tasks().forEach { it.configure { commonSrcFiles(*files) } }
+    override fun commonSrcFiles(files: Collection<Any>) = tasks().forEach { it.configure { commonSrcFiles(files) } }
+
     override fun linkerOpts(values: List<String>) = tasks().forEach { it.configure { linkerOpts(values) } }
     override fun linkerOpts(vararg values: String) = tasks().forEach { it.configure { linkerOpts(*values) } }
 

kotlin-native/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/konan/KonanSpecs.kt

@@ -61,6 +61,11 @@ interface KonanCompileSpec: KonanBuildingSpec {
     fun commonSourceSet(sourceSetName: String)
     fun commonSourceSets(vararg sourceSetNames: String)
 
+    fun commonSrcDir(dir: Any)
+
+    fun commonSrcFiles(vararg files: Any)
+    fun commonSrcFiles(files: Collection<Any>)
+
     // DSL. Other parameters.
 
     fun linkerOpts(vararg values: String)

kotlin-native/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/konan/tasks/KonanCompileTask.kt

@@ -282,10 +282,17 @@ abstract class KonanCompileTask: KonanBuildingTask(), KonanCompileSpec {
         enableMultiplatform(true)
     }
 
-    internal fun commonSrcDir(dir: Any) {
+    override fun commonSrcDir(dir: Any) {
         commonSrcFiles_.add(directoryToKt(dir))
     }
 
+    override fun commonSrcFiles(vararg files: Any) {
+        commonSrcFiles_.add(project.files(files))
+    }
+
+    override fun commonSrcFiles(files: Collection<Any>) = commonSrcFiles(*files.toTypedArray())
+
+
     // DSL. Other parameters.
 
     override fun linkerOpts(values: List<String>) = linkerOpts(*values.toTypedArray())