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flex is build as a tool inside the build system, so use it. [florian: bump package revision] Signed-off-by: Waldemar Brodkorb <mail@waldemar-brodkorb.de> Signed-off-by: Florian Fainelli <florian@openwrt.org> git-svn-id: svn://svn.openwrt.org/openwrt/packages@36105 3c298f89-4303-0410-b956-a3cf2f4a3e73