[Q21.5] Sync canna_api load/install paths

[Stephen J. Turnbull]

QUERY

Ville Skyttä writes:

 > PATCH 21.5
 > 
 > Cf. https://bugzilla.redhat.com/222559
 > 
 > "make install" installs canna_api.ell to MODPATH/canna_api.ell, but 
 > canna-activate looks for it in MODPATH/canna/canna_api.ell.  This patch 
 > changes canna-activate to use the installed location.

I'm pretty sure that will break run-in-place, that's why the canna/
prefix is there (I mostly run in-place).  This needs to be fixed
either in the module search code or in the module's make all or make
install targets.

Jerry, Mike, what do you think?