readline: override termlib for host

For some reason, it's not working right locally. Override as is done
with the target build.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/15916
Signed-off-by: Robert Marko <robimarko@gmail.com>

package/libs/readline/Makefile

@@ -48,6 +48,9 @@ endef
 HOST_CONFIGURE_ARGS += --disable-shared --with-pic
 CONFIGURE_ARGS += --with-curses --disable-install-examples
 
+HOST_CONFIGURE_VARS += \
+	bash_cv_termcap_lib=libncurses
+
 CONFIGURE_VARS += \
 	bash_cv_wcwidth_broken=no \
 	bash_cv_func_sigsetjmp=yes \