* lock0lock.c: remove lock_get_type() and include include/lock0priv.ic
* lock0priv.h: include lock0priv.ic and add lock_get_type() prototype
* Makefile.am: add lock0priv.ic to noinst_HEADERS
* lock0priv.ic: introduce this new file containing the body of
  lock_get_type()

This move is necessary in order to use lock_get_type() from other lock/
source files (it's going to be used in lock/lock0iter.c).

Approved by:	Heikki