mksh: Set TERM to xterm-256color

Change-Id: I1f5be6c8bec4a59375f8ec2a58020dee1841b3be
diff --git a/mkshrc b/mkshrc
index d37de12..256f20e 100644
--- a/mkshrc
+++ b/mkshrc
@@ -16,3 +16,5 @@
 
 	return $e
 }$HOSTNAME:${PWD:-?} '"$PS1 "
+
+export TERM=xterm-256color