rc(8): reorder_libs: print names of relinked libraries

rc(8): reorder_libs: print names of relinked libraries

When booting from slow media, the boot can appear to stall at the
"reordering libs" line for quite some time.  For my example, my G4
PowerMac booting from USB 1.1 takes a full minute to reorder the
libraries.

Let's print the name of each library before it is relinked.  This
gives the operator a better sense of what the machine is doing.  In
particular, it signals to the operator that the machine did not hang.

With input from kn@, deraadt@.  Positive feedback from sthen@.

Link: https://marc.info/?l=openbsd-tech&m=165914104421476&w=2
ok kn@