Fix bug introduced in r1157: when no output dir is specified, Soot should put the various output files from Spark into the default output dir sootOutput, rather than the root directory as r1157 made it do.
Fix bug introduced in r1157: when no output dir is specified, Soot should put
the various output files from Spark into the default output dir sootOutput,
rather than the root directory as r1157 made it do.

mbenz89/soot,anddann/soot,xph906/SootNew,plast-lab/soot,cfallin/soot,mbenz89/soot,cfallin/soot,mbenz89/soot,xph906/SootNew,mbenz89/soot,plast-lab/soot,anddann/soot,xph906/SootNew,anddann/soot,anddann/soot,cfallin/soot,plast-lab/soot,xph906/SootNew,cfallin/soot