[bootlin/training-materials] e3e185: yocto: slides: images: mention EXTRA_IMAGEDEPENDS

[Luca Ceresoli]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: e3e18501b0783fc5cea97c5351106c1bb0c820bb
      https://github.com/bootlin/training-materials/commit/e3e18501b0783fc5cea97c5351106c1bb0c820bb
  Author: Luca Ceresoli <luca.ceresoli at bootlin.com>
  Date:   2022-07-22 (Fri, 22 Jul 2022)

  Changed paths:
    M slides/yocto-image/yocto-image.tex

  Log Message:
  -----------
  yocto: slides: images: mention EXTRA_IMAGEDEPENDS

Signed-off-by: Luca Ceresoli <luca.ceresoli at bootlin.com>