Adjust Dr. Memory suppression
Adjust Dr. Memory suppression

- widening suppression for DrM-i#471

TBR=thestig@chromium.org
BUG=pdfium:238

Review URL: https://codereview.chromium.org/1467373003 .

DrAlexx/pdfium,andoma/pdfium,DrAlexx/pdfium,andoma/pdfium,andoma/pdfium,DrAlexx/pdfium,DrAlexx/pdfium,andoma/pdfium