raspbian: add missing library

* tests/Makefile.am: Here.
9 jobs for er/tmp in 109 minutes and 41 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #93095
alpine-gcc

00:48:27

passed #93096
arch-clang

00:44:07

passed #93097
arch-gcc-glibcxxdebug

01:17:56

passed #93094
debian-gcc-snapshot

01:49:40

passed #93092
debian-stable-gcc

01:07:44

passed #93093
debian-unstable-gcc-coverage

01:03:40

89.6%
passed #93098
mingw-shared

00:09:41

passed #93099
mingw-static

00:09:50

failed #93100
armv7
raspbian

01:28:10

 
Name Stage Failure
failed
raspbian Build
make[1]: Leaving directory '/mnt/data/gitlab-runner/builds/o5DHHxgA/0/spot/spot/spot-2.9.0.dev/_build/sub'
make: *** [Makefile:1559: distcheck] Error 1
Uploading artifacts...
Runtime platform arch=arm os=linux pid=3891 revision=a987417a version=12.2.0
./spot-*/_build/sub/tests/*/*.log: found 273 matching files

./*.log: found 1 matching files

./*.tar.gz: found 1 matching files

Uploading artifacts to coordinator... ok
id=93100 responseStatus=201 Created token=dcea_RjR
ERROR: Job failed: exit status 1