[test] Fix bitvector test by creating tmp dir. 15 failing tests left.
[test] Fix bitvector test by creating tmp dir. 15 failing tests left.

amitdo/tesseract,tesseract-ocr/tesseract,amitdo/tesseract,stweil/tesseract,UB-Mannheim/tesseract,UB-Mannheim/tesseract,tesseract-ocr/tesseract,stweil/tesseract,tesseract-ocr/tesseract,tesseract-ocr/tesseract,stweil/tesseract,amitdo/tesseract,UB-Mannheim/tesseract,amitdo/tesseract,stweil/tesseract,amitdo/tesseract,stweil/tesseract,UB-Mannheim/tesseract,tesseract-ocr/tesseract,UB-Mannheim/tesseract