[build] Fix outputs for the cache task

A klib filename without extension was used to determine a name
of a cache directory for this klib. This is incorrect if the
klib is stored in a directory with dots in its name. This breaks
up-to-date checks, so Gradle doesn't rerun the task if the
cache directory was deleted.

This patch fixes this issue.

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

@@ -34,7 +34,9 @@ open class KonanCacheTask: DefaultTask() {
     @get:OutputDirectory
     protected val cacheFile: File
         get() {
-            val klibName = originalKlib.nameWithoutExtension
+            val klibName = originalKlib.let {
+                if (it.isDirectory) it.name else it.nameWithoutExtension
+            }
             return cacheDirectory.resolve("${klibName}-cache")
         }