Use allocated cplus_specific for cplus symbols.

Use allocated cplus_specific for cplus symbols.

2010-07-16  Sami Wagiaalla  <swagiaal@redhat.com>

	* symtab.h (symbol_set_demangled_name): Now takes an optional objfile*
	argument.
	(cplus_specific): New struct.
	* symtab.c (symbol_set_demangled_name): Updated.
	Use cplus_specific for cplus symbols.
	(symbol_get_demangled_name): Retrive the name from the cplus_specific
	struct for cplus symbols.
	(symbol_init_language_specific): Set cplus_specific for cplus symbols.
	(symbol_set_names): Pass objfile to symbol_set_demangled_name.
	* symtab.c (symbol_init_cplus_specific): New function.