Added the capability for the dell_raid build to pull the RAID firmware
from the users home directory if it does not exist in the build cache.
This is mainly useful when building with the --wild-cache option.
Fixed a typo in the cp command
Merge pull request #8 from pentameter/pull-req-release-pebbles-master-6b664619f247ebee3bc15942847e1f0a3a8f255c

Update build.sh to look for external files in users home directory [1/1]