Update build-sandbox.sh to accomodate moved jenkins-junit-munge.xsl.
Update build-sandbox.sh to accomodate moved jenkins-junit-munge.xsl.

Also, change some paths in script to be easier to update for repo split.

GaloisInc/saw-script,GaloisInc/saw-script,GaloisInc/saw-script,GaloisInc/saw-script,GaloisInc/saw-script