Log Message:
libisoburn: Update to 1.5.2

libisoburn-1.5.2.tar.gz  Sat Oct 26 2019
===============================================================================
* Bug fix: -disk_pattern on -add ./ -- mistook "./" for the root directory
  Thanks JBThiel.
* Bug fix: -disk_pattern on -add "" -- yielded SIGSEGV
* Bug fix: -osirrox "concat_split_on" worked only together with -split_size
           larger than 0. Thanks William Willems.
* New API calls isoburn_igopt_set_part_type_guid(),
  isoburn_igopt_get_part_type_guid(), isoburn_igopt_set_iso_type_guid(),
  isoburn_igopt_get_iso_type_guid()
* Enabled GPT type GUIDs with -append_partition,
  -boot_image any iso_mbr_part_type=, and -as mkisofs -iso_mbr_part_type
* Made libisoburn and GNU xorriso ready for building out-of-source.
  Thanks Ross Burton.