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ci: suppress valgrind failure on Debian related to the xz backdoor

Íñigo Huguet requested to merge ih/valgrind-lzma into main


Suppress a Valgrind failure not related to our code that is making the CI to be red in Debian testing and sid.


On Debian sid and testing we get these Valgrind failures that are not related to our code, but to the xz backdoor that has been discovered.

Supress them. If we don't do it, we'll need to ignore the red state and it might cover other problems different to this one.

The suppression contains the version of liblzma so I hope that it won't be used once liblzma is updated to a new (and fixed) version in Debian repos.

Valgrind logs:

 Invalid write of size 8
    at 0x508AD45: ??? (in /usr/lib/x86_64-linux-gnu/
    by 0x506D81B: ??? (in /usr/lib/x86_64-linux-gnu/
    by 0x6A00000006: ???
    by 0x5066FFF: ??? (in /usr/lib/x86_64-linux-gnu/
    by 0x203A2900A5DE11FF: ???
    by 0x1FFEFFC34F: ???
    by 0x400EFAA: elf_machine_rela (dl-machine.h:300)
    by 0x400EFAA: elf_dynamic_do_Rela (do-rel.h:147)
    by 0x400EFAA: _dl_relocate_object (dl-reloc.c:301)
    by 0x52296FF: ???
    by 0x543762F: ???
    by 0x1FFEFFC2DF: ???
  Address 0x1ffeffb3f8 is on thread 1's stack
  136 bytes below stack pointer


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