raspbian: add missing library

* tests/Makefile.am,
python/Makefile.am: Here.
9 jobs for er/tmp in 92 minutes and 15 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #93106
alpine-gcc

00:48:37

passed #93107
arch-clang

00:51:41

passed #93108
arch-gcc-glibcxxdebug

01:10:49

passed #93105
debian-gcc-snapshot

01:32:14

passed #93103
debian-stable-gcc

01:01:48

passed #93104
debian-unstable-gcc-coverage

00:59:12

89.6%
passed #93109
mingw-shared

00:10:20

passed #93110
mingw-static

00:09:17

passed #93111
armv7
raspbian

01:31:35