board/common: replace pager symlink with a tiny shell script

These are basically the same flags as was passed to klish, but now we
use -R instead of -r to make sure only ANSI coloŕ escapes can affect
the behavior of less.

This change will make it posslbe to shop off too long lines and scroll
vertically on really long lines instead for them breaking output.

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

board/common/rootfs/usr/bin/pager

@@ -1 +0,0 @@
-less

board/common/rootfs/usr/bin/pager

@@ -0,0 +1,13 @@
+#!/bin/sh
+# -d ;; suppress error message "the terminal is dumb"
+# -F :: exit if the entire file can be displayed on the first screen
+# -I :: Ignore case, even for patterns
+# -K :: exit immediately when an interrupt character (usually ^C) is typed
+# -R :: Almost raw control charachters, only ANSI color escape sequences and
+#       OSC 8 hyperlink sequences are output.  Allows veritcal scrolling
+# -S :: lines longer than the screen width are chopped (truncated), not wrapped
+# -X :: No termcap initialization and deinitialization set to the terminal.
+#       This is what leaves the contents of the output on screen.
+
+export LESS="-P %f (press h for help or q to quit)"
+less -RISKd -FX "$@"