Bug#1077910: notmuch: autopkgtest failure with glib 2.81.1

[Jeremy Bícha]

Since glib 2.81.1 is already in Unstable and this is blocking glib2.0
from migrating from Unstable to Testing, I would consider this to be a
RC issue. I agree this is not a ftbfs issue.

Thank you,
Jeremy Bícha