Update Mac corpus expectations for FT roll.

This updates the Mac expectations for the FreeType c06b9cf roll.
The previous try somehow did not update the Mac expectation files
correctly.

BUG=chromium:754574,pdfium:905

Change-Id: I7d1bbdcf7f4f89f76f1c996975209e8acf784c98
Reviewed-on: https://pdfium-review.googlesource.com/15472
Reviewed-by: Nicolás Peña Moreno <npm@chromium.org>