image_building.md: Minor tweaks and typo corrections
A few minor tweaks to subtly improve the description and fix a typo in one of the commands.
Signed-off-by: Martyn Welch martyn.welch@collabora.com
A few minor tweaks to subtly improve the description and fix a typo in one of the commands.
Signed-off-by: Martyn Welch martyn.welch@collabora.com
merged