board/netconf: wrap klish in a fuzzy warm blanket

Having klish as the login shell means losing lots of neat features we've
gotten used to: help text in less pager, initial terminal probing on the
console, and more.

This commit replaces the clish -> klish symlnk with a fuzzy bash wrapper
that fixes all the above annoying little things.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

board/netconf/rootfs/bin/clish

@@ -1 +0,0 @@
-../usr/bin/klish

board/netconf/rootfs/bin/clish

@@ -0,0 +1,3 @@
+#!/bin/bash -li
+# Source settings, aliases, and probe terminal size, then hand over to klish
+exec /usr/bin/klish