Add simplejson folder to build.sh script.
Add simplejson folder to build.sh script.

Patch by: Pawel Solyga
Reviewed by: to-be-reviewed

MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging