gdb/

gdb/
	* jit.c: Include block.h, dictionary.h and frame-unwind.h.
	(add_objfile_entry, jit_target_read_impl, jit_object_open_impl)
	(jit_symtab_open_impl, compare_block, jit_block_open_impl)
	(jit_symtab_line_mapping_add_impl, jit_symtab_close_impl)
	(finalize_symtab, jit_object_close_impl)
	(jit_reader_try_read_symtab, jit_bfd_try_read_symtab)
	(free_objfile_data): New functions.
	(_initialize_jit): Register jit_objfile_data with a proper cleanup
	function.