Reproducible builds?

[Vít Ondruch]

Hi everybody,

Recently, there was opened this ticket:

https://bugzilla.redhat.com/show_bug.cgi?id=1719647

In short, there are some issues with -doc noarch subpackages, which are
not precisely identical coming from different builders, due to embedded
timestamps. As it turns out, there is SOURCE_DATE_EPOCH environment
variable available in RDoc, which allows to specify the timestamp and
therefore workaround the issue. And I think this could be useful for our
packages, therefore I created this PR:

https://src.fedoraproject.org/rpms/ruby/pull-request/47

It modifies %gem_install macro and sets the timestamp for each gem. Is
there any reason, why not merge this PR?


Vít