* jv-lang.c (get_java_class_symtab): Use allocate_global_block,

	* jv-lang.c (get_java_class_symtab): Use allocate_global_block,
	set_block_symtab.
	* jit.c (finalize_symtab): Use allocate_global_block,
	set_block_symtab.
	* buildsym.c (finish_block_internal): New function, from old
	finish_block.
	(finish_block): Rewrite.
	(end_symtab): Use finish_block_internal, set_block_symtab.
	* block.h (struct global_block): New.
	(allocate_global_block, set_block_symtab): Declare.
	* block.c (allocate_global_block, set_block_symtab): New
	functions.