use SIGKILL in remap_dead_pid test

For some undiagnosed reason, this test hangs for me when using SIGINT. Since we
always want to kill this process anyway, use SIGKILL instead.
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/live/static/remap_dead_pid.c

@@ -45,7 +45,7 @@ int main(int argc, char **argv)
 		fd = open(path, O_RDONLY);
 
 		/* no matter what, we should kill the child */
-		kill(pid, SIGINT);
+		kill(pid, SIGKILL);
 		result = waitpid(pid, NULL, 0);
 		if (result < 0) {
 			fail("failed waitpid()");