Fix library segment-address for 64bit values

Fix library segment-address for 64bit values

The address was written as a long value, but long is always a 32bit value
on Windows, which lead to truncated addresses.
The solution was to use paddress instead.

gdb/gdbserver/ChangeLog:

2020-01-28  Hannes Domani  <ssbssa@yahoo.de>

	* server.c (handle_qxfer_libraries): Write segment-address with
	paddress.