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

Updated build.sh to look in users home directory if the external files required for dell_raid barclamp are not already in the build cache.  
This is mainly applicable to running with the --wild-cache flag.


 build.sh | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

Crowbar-Pull-ID: 6b664619f247ebee3bc15942847e1f0a3a8f255c

Crowbar-Release: pebbles