[coreboot-gerrit] Change in em100[master]: Add network update functionality

[Stefan Reinauer (Code Review)]

Hello build bot (Jenkins), Patrick Georgi, Martin Roth,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/em100/+/37072

to look at the new patch set (#10).

Change subject: Add network update functionality
......................................................................

Add network update functionality

Update chip database and firmware images over the network.
If you wish to update your chips database or firmware
archive, you can now use em100 -U to do so.

The files configs.tar.xz, firmware.tar.xz and VERSION will be
downloaded and stored in $EM100_HOME if it is set. Otherwise
$HOME/.em100 will be used as a default. If the directory does
not exist when running the command, it will be created before
downloading.

These tarballs are the same tarballs that are created with the
make tarballs target.

Change-Id: I5c378754da4ce06b63f317eb22fa237d7a616fd8
Signed-off-by: Stefan Reinauer 
---
M Makefile
A curl.c
M em100.c
3 files changed, 150 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/em100 refs/changes/72/37072/10