While support for the FLOWOFFLOAD target is available in the firmware
images, it is still missing in some of the binary packages on
downloads.openwrt.org, e.g. for the mipsel_mips32 architecture.
Increment PKG_RELEASE to force an update of these packages.
Also adjust the package description to include the FLOWOFFLOAD target.
Signed-off-by: Mirko Parthey <mirko.parthey@web.de>