cracklib: backport upstream patch

https://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/meta/recipes-extended/cracklib?id=fde198b76dd03b09e7d33e37a53310d293d8f259
gnomeos-contents: remove bashism from cleanup script

Not as nice as what was there previously, but compatibility has a
price...