iputils: fix compile when using eglibc

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 41342

package/network/utils/iputils/Makefile

@@ -67,7 +67,7 @@ endef
 define Package/iputils-ping6
 $(call Package/iputils/Default)
   TITLE:=iputils - ping6
-  DEPENDS+= @IPV6
+  DEPENDS+= @IPV6 +USE_EGLIBC:libopenssl
 endef
 
 define Package/iputils-ping6/description