Makefile.inc: Notify about updating submodules

There is no longer any information printed when updating submodules, so
on the initial build, this can lead to a long delay without explaining
what's going on.
Just add an information line that the submodules are being updated so
that the user can see what's happening.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I987e50b99e39b976bc8367525549153e1eba69cd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65322
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Felix Singer <felixsinger@posteo.net>

0 files changed, 0 insertions, 0 deletions