[util-io][properties] close file stream after save property operation ends.

(cherry picked from commit f0ae971f9304ecd7a2ba134ab77b511a0569ed5f)

compiler/util-io/src/org/jetbrains/kotlin/konan/properties/Properties.kt

@@ -28,7 +28,9 @@ fun File.saveProperties(properties: Properties) {
     }
 
     // TODO: don't act like this
-    outputStream().write(String(byteStream.toByteArray()).split("\n").drop(1).joinToString("\n").toByteArray())
+    outputStream().use {
+        it.write(String(byteStream.toByteArray()).split("\n").drop(1).joinToString("\n").toByteArray())
+    }
 }
 
 fun Properties.saveToFile(file: File) = file.saveProperties(this)