Bug#852959: Pending fixes for bugs in the prometheus package

[pkg-go-maintainers]

tag 852959 + pending
thanks

Some bugs in the prometheus package are closed in revision
6b977c959a7fa2a9460507a5d923dcbdd825c239 in branch 'debian/sid' by
Martín Ferrari

The full diff can be seen at
https://anonscm.debian.org/cgit/pkg-go/packages/prometheus.git/commit/?id=6b977c9

Commit message:

    Disable "long" tests in arm*, which take way too long and run out of 
memory. Closes: #852959.