makefile: complete the help menu
makefile: complete the help menu

makefile items such as "check test", "mod.update", "mod.check" were
missing from help menu.

Signed-off-by: Jiffin Tony Thottan <ac134a614b50f2e879db85acb9f4b45b24a210dc@gmail.com>

rook/nfs,rook/nfs,rook/rook,rook/nfs,rook/rook,rook/rook,rook/rook,rook/rook