The store-build-time-in-utc note used an invalid section 'upgrades', it
should be in singular form: 'upgrade'.
Was introduced by Ie0cfce385854caa5adbd27f7f13042e7bfd41f1b and the note
is intended for 3.0.2.
Change-Id: I27db5552857d85b1c66397a8df3bdf5fac352bb5
Always store build times in UTC instead of local time. This may lead to
a mix of timezones since the old build times are still stored in local
time.
Change-Id: Ie0cfce385854caa5adbd27f7f13042e7bfd41f1b