autopkgtest failure due to gcc warnings on armhf

[Andreas Hasenack]

pkgconf dep8 is currently failing[1] on armhf:

341s libpkgconf/client.c: In function 'pkgconf_client_new':
341s libpkgconf/client.c:162:47: warning: 'calloc' sizes specified with 'sizeof' in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
341s 162 | pkgconf_client_t *out = calloc(sizeof(pkgconf_client_t), 1);
341s | ^~~~~~~~~~~~~~~~
341s libpkgconf/client.c:162:47: note: earlier argument should specify number of elements, later size of each element
(...)

666s autopkgtest [18:36:49]: @@@@@@@@@@@@@@@@@@@@ summary
666s testsuite FAIL stderr: libpkgconf/client.c: In function 'pkgconf_client_new':
666s basic PASS

There are other warnings after that one.

1. https://autopkgtest.ubuntu.com/results/autopkgtest-oracular/oracular/armhf/p/pkgconf/20240726_183653_4124e@/log.gz

[Andreas Hasenack (ahasenack)]

https://github.com/pkgconf/pkgconf/commit/d454f62c73e069199e4a706dcd50be580f06e5c7 is likely the fix, I'm testing it.