[bootlin/training-materials] fe02bb: labs/sysdev-thirdparty: fix alsa-lib instructions

[Thomas Petazzoni]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: fe02bbad63713c8717e6da8a5dc08e7f0272a26e
      https://github.com/bootlin/training-materials/commit/fe02bbad63713c8717e6da8a5dc08e7f0272a26e
  Author: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
  Date:   2022-09-28 (Wed, 28 Sep 2022)

  Changed paths:
    M labs/sysdev-thirdparty/sysdev-thirdparty.tex

  Log Message:
  -----------
  labs/sysdev-thirdparty: fix alsa-lib instructions

First, the ALSA config files should be installed as part of the
alsa-lib step, not the alsa-utils step, because they are part of
alsa-lib, not alsa-utils.

Second, instead of cherry-picking a random set of config files, which
leads to a "speaker-test" working but still spitting out a bunch of
error messages, we copy the full set of configuration files (simpler)
and adjust the one thing that causes problem. We now have simpler
instructions, and a speaker-test that doesn't spit out weird error
messages.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>