Resolve ftbfs caused by libjxl-testdata
This MR addresses 1129972
The root cause is a removed test data file from the upstream sources of libjxl-testdata. We can cherry-pick unreleased test changes to work around this problem or disable the test altogether.
Changes:
- d/p/split_test.patch: cherry-pick test changes from upstream commit to resolve ftbfs (Closes: #1129972).
Testing:
- rebuild in resolute chroot
- rebuild in sid chroot
Edited by Vladimir Petko