[bootlin/training-materials] 04fc8e: common/strace.tex: mention "strace -f"

[Michael Opdenacker]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: 04fc8e595a190f7be645edc23213943c519ac7d4
      https://github.com/bootlin/training-materials/commit/04fc8e595a190f7be645edc23213943c519ac7d4
  Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
  Date:   2022-09-30 (Fri, 30 Sep 2022)

  Changed paths:
    M common/strace.tex

  Log Message:
  -----------
  common/strace.tex: mention "strace -f"

To follow child processes too

Signed-off-by: Michael Opdenacker <michael.opdenacker at bootlin.com>