or1k: Rename __init/__fini to _init/_fini

GNU LD only inserts the DT_INIT/DT_FINI elements on functions
named _init/_fini and the dynamic loader is using those elements
to run the initialization and termination functions.

* libgcc/ChangeLog.or1k:

2013-07-10  Stefan Kristiansson  <stefan.kristiansson@saunalahti.fi>

	* config/or1k/crti.S: Rename __init/__fini to _init/_fini