This update for libexif fixes the following issues:

- CVE-2020-0181: Fixed an integer overflow that could lead to denial of service
  (bsc#1172802).
- CVE-2020-0198: Fixed and unsigned integer overflow that could lead to denial
  of service (bsc#1172768).
- CVE-2020-0452: Fixed a buffer overflow check that could be optimized away
  by the compiler (bsc#1178479).