Marco Falke's old key expired, causing a travis error while verifying
commits 36afd4db44 and before:
gpg: Good signature from "Marco Falke <marco.falke@tum.de>" [unknown]
gpg: aka "Marco Falke <falke.marco@gmail.com>" [unknown]
gpg: Note: This key has expired!
Primary key fingerprint: B8B3 F1C0 E58C 15DB 6A81 D30C 3648 A882 F431 6B9B
Subkey fingerprint: FE09 B823 E6D8 3A3B C798 3EAA 2D7F 2372 E50F E137
Update the trusted root commit to the commit after that, to fix
this issue.
(cherry picked from commit 7deba93bdc76616011a9f493cbc203d60084416f)