bin/generate-zbm: add .linux section last

systemd-boot's ukify script recommends adding the .linux section last so
that when it's decompressed, it doesn't overflow other sections.

https://github.com/systemd/systemd/blob/main/src/ukify/ukify.py#L774-L817

Author: zdykstra

bin/generate-zbm

@@ -841,9 +841,11 @@ sub createUEFIBundle {
     $uki_offset = addBundleSection( \@cmd, ".cmdline", $cmdline, $uki_offset, $uki_alignment );
   }
 
-  $uki_offset = addBundleSection( \@cmd, ".linux",  $kernel,    $uki_offset, $uki_alignment );
   $uki_offset = addBundleSection( \@cmd, ".initrd", $initramfs, $uki_offset, $uki_alignment );
 
+  # Add the kernel last, so that it can decompress without overflowing other sections
+  $uki_offset = addBundleSection( \@cmd, ".linux",  $kernel,    $uki_offset, $uki_alignment );
+
   push( @cmd, ( $uefi_stub, $output_file ) );
 
   my $command = join( ' ', @cmd );