libjpeg-turbo-1.5.3-5.15.7

- security update
- added patches
  fix CVE-2020-13790 [bsc#1172491], heap-based buffer over-read in get_rgb_row() in rdppm.c via a malformed PPM input file
  + libjpeg-turbo-CVE-2020-13790.patch

- security update [bsc#1156402]
- modified patches
  % libjpeg-turbo-CVE-2019-2201.patch (use upstream one)

- security update
- added patches
  CVE-2019-2201 [bsc#1156402]
  + libjpeg-turbo-CVE-2019-2201.patch

- security update
- added patches
  fix CVE-2020-35538 [bsc#1202915], Null pointer dereference in jcopy_sample_rows() function
  + libjpeg-turbo-CVE-2020-35538.patch