obs/slapos: fix runpath in all libraries

some libraries have their version after the '.so' and we need to match
them also (like it's done in line 105 of this same file).

tomo@tomo-node:~$ ls -l /opt/slapos/parts/gettext/lib/libintl.so
lrwxrwxrwx 1 root root 16 Feb 19 14:48 /opt/slapos/parts/gettext/lib/libintl.so -> libintl.so.8.4.0