Fix building res_crypto on systems that init locks with constructors.

Fix building res_crypto on systems that init locks with constructors.

The problem was that res_crypto now has a RWLIST named "keys".  The macro
for defining this list defines a function used as a constructor for the list
called "init_keys".  However, there was another function called init_keys in
this module for a CLI command.  The fix is just to prepend the generated
functions with underscores.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@78138 65c4cc65-6c06-0410-ace0-fbb531ad65f3