File hppc-timestamp.patch of Package hppc

--- hppc-0.7.1/hppc-template-processor/src/main/java/com/carrotsearch/hppc/generator/TemplateOptions.java	2015-05-07 09:32:26.000000000 +0200
+++ hppc-0.7.1/hppc-template-processor/src/main/java/com/carrotsearch/hppc/generator/TemplateOptions.java	2023-09-14 16:19:35.996103476 +0200
@@ -88,7 +88,11 @@
    */
   public String getTimeNow() {
     SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ROOT);
-    return format.format(new Date());
+    Date now = new Date();
+    if (System.getenv("SOURCE_DATE_EPOCH") != null) {
+      now = new Date(1000 * Long.parseLong(System.getenv("SOURCE_DATE_EPOCH")));
+    }
+    return format.format(now);
   }
 
   public String getTemplateFile() {