gdb/

	gdb/
	* remote.c (crc32): Constify `buf' parameter.
	(remote_verify_memory): New, abstracted out from...
	(compare_sections_command): ... this.  Remove hardcoded target
	checks.
	(init_remote_ops): Install remote_verify_memory.
	* target.c (target_verify_memory): New.
	* target.h (struct target_ops) <to_verify_memory>: New field.
	(target_verify_memory): Declare.