Fix interactive boot commands docs.
Fix interactive boot commands docs.

https://bugs.linaro.org/show_bug.cgi?id=185

Change-Id: I12002466b9d907f111b01c9517beae39bc6d5219
(cherry picked from commit 105f294ebca889eb7d5b44b08490d4ce32a8afd2)

Linaro/lava-server,Linaro/lava-server,Linaro/lava-server,Linaro/lava-server