File reproducible-version.patch of Package java-21-openj9

--- a/omr/tools/compiler/scripts/generateVersion.pl
+++ b/omr/tools/compiler/scripts/generateVersion.pl
@@ -39,7 +39,7 @@ if (defined $ENV{"TR_BUILD_NAME"}) {
     # FIXME: try to include a workspace name too
     # Optionally, check if the user has defined $USER_TR_VERSION, and incorporate
     # too.
-    my $time = POSIX::strftime("%Y%m%d_%H%M", localtime($^T));
+    my $time = POSIX::strftime("%Y%m%d_%H%M", localtime($ENV{SOURCE_DATE_EPOCH} || $^T));
     $snapshot_name = $rel . "_" . $time . "_" . $ENV{LOGNAME};
 }