[PATCH] debuginfod/debuginfod-client.c: correct string format on 32bit arches with 64bit time_t

[Frank Ch. Eigler]

Hi -

> According to 'man 3 printf' %j appeared in glibc 2.1 and seems to be C99
> feature. That's decidedly ancient.

OK. 

> And may I be allowed to suggest, unless elfutils is tested in upstream CI
> with decade-old toolchains, you should not be considering its compatibility
> with them.

Deployment of elfutils is not limited to platforms that happen to be
included in upstream CI that you see.  RHEL7 uses glibc 2.17 from
2012; RHEL6 years before that.  We do not wish to unnecessarily break
them.

- FChE