Move buildroot to bsp directory.

bsp/buildroot/package/logrotate/logrotate.conf

@@ -0,0 +1,14 @@
+compress
+
+include /etc/logrotate.d
+
+/var/log/messages /var/log/auth.log /var/log/user.log {
+	rotate 7
+	daily
+	delaycompress
+	missingok
+	sharedscripts
+	postrotate
+		/usr/bin/killall -HUP syslogd
+	endscript
+}