OpenWrt should be upgraded

According to "svn log -r 41143 svn://svn.openwrt.org/openwrt/trunk", curl has been moved.
It will cause "missing libcurl" error during build.
So we should use newer version for OpenWrt Trunk.

"procd" of OpenWrt-r41224 also cannot be built (svn log -r 41239 svn://svn.openwrt.org/openwrt/trunk).
That's why I use the newer r41240.