Revert "gen_initramfs: libply-splash-core.so.* moved to /usr/lib"

This reverts commit bdf9e5a180f5ad45ba75ecdb2883f516db0522c0.
gen_initramfs: libply-splash-core.so.* moved to /usr/lib

This is still part of the ridiculous, pointless and unsafe plymouth
move to /usr