[KLIB] Do not store Date in klib manifest

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

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.konan.properties
 
 import org.jetbrains.kotlin.konan.file.*
 import org.jetbrains.kotlin.konan.util.parseSpaceSeparatedArgs
+import java.io.ByteArrayOutputStream
 
 typealias Properties = java.util.Properties
 
@@ -21,9 +22,13 @@ fun File.loadProperties(): Properties {
 fun loadProperties(path: String): Properties = File(path).loadProperties()
 
 fun File.saveProperties(properties: Properties) {
-    this.outputStream().use {
+    val byteStream = ByteArrayOutputStream()
+    byteStream.use {
         properties.store(it, null)
     }
+
+    // TODO: don't act like this
+    outputStream().write(String(byteStream.toByteArray()).split("\n").drop(1).joinToString("\n").toByteArray())
 }
 
 fun Properties.saveToFile(file: File) = file.saveProperties(this)