Enable custom bcache hash function.

Enable custom bcache hash function.

2010-08-25  Sami Wagiaalla  <swagiaal@redhat.com>

	* psymtab.c (add_psymbol_to_bcache): Remove 'static' from
	'static partial_symbol psymbol'.
	(psymbol_hash): New function.
	(psymbol_compare): New function.
	* bcache.c (hash_continue): New.
	(hash): Use hash_continue.
	* bcache.c: Add hash_function and compare_function
	pointers to bcache struct.
	(bcache_full): Use bcache->hash_function, and
	bcache->compare_function.
	(bcache_compare): New function.
	(bcache_xmalloc): Take hash_function and
	compare_function arguments and initialize the
	bcach's pointers.
	Updated comment.
	* objfiles.c (allocate_objfile): Updated.
	* symfile.c (reread_symbols): Updated.
	* python/py-type.c (typy_richcompare): Updated.