When libevent2 was found in staging directory the configure scripts
automatically adds a dependency to it. This breaks the build as
mentioned in #13742.
To keep the footprint on the target small let's explicit disable
it rather than adding an dependency on libevent2.
Signed-off-by: Michael Heimpold <mhei@heimpold.de>
git-svn-id: svn://svn.openwrt.org/openwrt/packages@37379 3c298f89-4303-0410-b956-a3cf2f4a3e73
