Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
While we're at it, relocate from libs/ to utils/ as it provides executables and change the directory name from rrdtool-1.0.x to rrdtool1 to make it match the source package name. Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>