fixes incremental build with change to CONFIG_DROPBEAR_ECC drop --with-shared which is unknown to configure Patch by Catalin Patulea <cat@vv.carleton.ca> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40300 3c298f89-4303-0410-b956-a3cf2f4a3e73