readline: link directly against ncurses

Fixes link issues on uClibc for applications using libreadline.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/readline/readline-6.1-curses-link.patch

@@ -0,0 +1,16 @@
+link readline directly to ncurses since it needs symbols from it
+
+upstream readline does this on purpose (no direct linking), but
+it doesn't make much sense in a Linux world
+
+--- a/support/shobj-conf
++++ b/support/shobj-conf
+@@ -42,7 +42,7 @@
+ SHOBJ_LIBS=
+ 
+ SHLIB_XLDFLAGS=
+-SHLIB_LIBS=
++SHLIB_LIBS=-lncurses
+ 
+ SHLIB_DOT='.'
+ SHLIB_LIBPREF='lib'