vis: Add build description for BAT results
For combined-alt.html: 'group_by_run' will always be 'true' For other html file: 'group_by_run' will always be 'false' Since the 'bat.json' has object 'desc', hence below check is only for bat results
This fixes: issue#49
Signed-off-by: Manish Kumar manish3.kumar@intel.com