gdb: some int to bool conversion

gdb: some int to bool conversion

Change int parameter to bool in remote_notice_new_inferior (remote.c)
and notice_new_inferior (infcmd.c), and update the callers.

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* infcmd.c (notice_new_inferior): Change parameter type.
	* inferior.h (notice_new_inferior): Change parameter type.
	* remote.c (remote_notice_new_inferior): Change parameter type to
	bool.  Also update type of local variable to bool.
	(remote_target::update_thread_list): Change type of local variable
	to bool.
	(remote_target::process_stop_reply): Pass bool instead of int to
	remote_notice_new_inferior.