gdb/

gdb/
	Fix separate debuginfo warning with "remote:" access.
	* objfiles.h (struct objfile): New fields crc32 and crc32_p.
	* symfile.c (get_file_crc): New function with the code moved from ...
	(separate_debug_file_exists): ... this function, specifically variables
	buffer and count.  New variable verified_as_different, set it.  Remove
	file_crc initialization.  Verify also if both files are not the same
	manually, if needed.