[K/N] Added new output kind (will be used later)

PRELIMINARY_CACHE only builds additional (IR-based) info for a cache,
will be used later in per-file caches

native/utils/src/org/jetbrains/kotlin/konan/target/CompilerOutputKind.kt

@@ -34,6 +34,9 @@ enum class CompilerOutputKind {
     STATIC_CACHE {
         override fun suffix(target: KonanTarget?) = ".${target!!.family.staticSuffix}"
         override fun prefix(target: KonanTarget?) = target!!.family.staticPrefix
+    },
+    PRELIMINARY_CACHE {
+        override fun suffix(target: KonanTarget?) = ""
     };
 
     abstract fun suffix(target: KonanTarget? = null): String