The build is requiring a installed SQlite3 version of >= 3.28.0 which is
quite a recent upstream version.
Typically Thunderbird isn't using the most recent functions from SQlite
and we can safely downgrade the build requirement for SQlite.
Downgrading the version the version which is available on unstable.
Gbp-Pq: Topic debian-hacks
Gbp-Pq: Name Downgrade-SQlite-version-to-3.27.2.patch
W32API_VERSION=3.14
STARTUP_NOTIFICATION_VERSION=0.8
DBUS_VERSION=0.60
-SQLITE_VERSION=3.28.0
+SQLITE_VERSION=3.27.2
dnl Set various checks
dnl ========================================================