Build: Fix compatibility with shadow plugin

Apply java-base plugin since shadow task requires sourcesets

libraries/reflect/build.gradle.kts

@@ -95,7 +95,7 @@ class KotlinModuleShadowTransformer(private val logger: Logger) : Transformer {
     override fun hasTransformedResource(): Boolean =
             data.isNotEmpty()
 
-    override fun modifyOutputStream(os: ZipOutputStream) {
+    override fun modifyOutputStream(os: ZipOutputStream, preserveFileTimestamps: Boolean) {
         for ((path, bytes) in data) {
             os.putNextEntry(ZipEntry(path))
             os.write(bytes)

prepare/kotlin-annotation-processing-embeddable/build.gradle.kts

@@ -4,7 +4,9 @@ import org.gradle.jvm.tasks.Jar
 
 description = "Annotation Processor for Kotlin (for using with embeddable compiler)"
 
-plugins { base }
+plugins {
+    `java-base`
+}
 
 val packedJars by configurations.creating