Bug#1090354: libmodulemd: flaky autopkgtest on riscv64: module_index_merger_debug: times out after 2 minutes

[Simon McVittie <smcv@debian.org>]

Source: libmodulemd
Version: 2.14.0-3
Severity: important
User: debian-ci@lists.debian.org
Usertags: flaky
X-Debbugs-Cc: debian-ci@lists.debian.org

The libmodulemd autopkgtest 'module_index_merger_debug' intermittently
fails on the riscv64 runners on ci.debian.net, which the testing migration
infrastructure assumes is a regression in a package that was upgraded,
preventing packages like glib2.0 and meson from migrating to testing
until the libmodulemd autopkgtest is retried. For example, please see:

https://ci.debian.net/packages/libm/libmodulemd/testing/riscv64/55201008/
https://ci.debian.net/packages/libm/libmodulemd/testing/riscv64/54969981/
https://ci.debian.net/packages/libm/libmodulemd/testing/riscv64/54604298/

When the test succeeds, it generally takes around 60 to 100 seconds on
riscv64, which is uncomfortably close to the timeout, so I think it might
just be that slow. Probably running `meson test --timeout-multiplier=10`
(as the debian/rules seems to do) would help?

Thanks,
    smcv