component/readline: force to use curses lib

if libtinfo was present on the system, readline would prefer to use it instead of libncurses

component/readline/buildout.cfg

@@ -45,6 +45,7 @@ patches =
 configure-options =
   --enable-multibyte
   --disable-static
+  --with-curses
 environment =
   CPPFLAGS=-I${ncurses:location}/include
   LDFLAGS=-L${ncurses:location}/lib -Wl,-rpath=${ncurses:location}/lib