fixup! Add so-long library

Latest WIP
1 job for scratch/so-long in 11 minutes and 35 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #1348
test

00:11:35

 
Name Stage Failure
failed
test Test
Makefile:301: recipe for target 'so-long.elc' failed
make[2]: Leaving directory '/builds/emacs/emacs/lisp'
make[2]: *** [so-long.elc] Error 1
Makefile:324: recipe for target 'compile-main' failed
make[1]: *** [compile-main] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/lisp'
Makefile:408: recipe for target 'lisp' failed
make: *** [lisp] Error 2
ERROR: Job failed: exit code 1