CODINGSTYLE: Add link to libutil
Format reference to libutil in code style and add link to its subdirectory.
Acked-by: Michael Holzheu
Coding guidelines for s390-tools
================================
-For s390-tools the preferred language is C. We provide libraries, e.g. libutil
-that should be used by all tools if possible.
+For s390-tools the preferred language is C. We provide libraries, e.g.
+[`libutil`](libutil) that should be used by all tools if possible.
The coding style is based on the Linux kernel guidelines. Therefore, use
the checkpatch tool for verification before you submit a patch:
