fix typo in my prev commit

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@2077 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/socat/Config.in

-config BR2_PACKAGE_SIPSAK
+config BR2_PACKAGE_SOCAT
 	tristate "socat - A multipurpose relay (SOcket CAT)"
 	default m if CONFIG_DEVEL
 	select BR2_PACKAGE_LIBOPENSSL