Bug#833953: Upgrading libharfbuzz0b:amd64 1.0.1-1+b1 -> 1.2.7-1+b1 fixed issue.

[Oleksandr Gavenko]

Both Chromium 43.x.x.x and 52.x.x.x crashed with libharfbuzz0b:amd64
1.0.1-1+b1.

Updating to 1.2.7-1+b1 fixed issue.

Chromium package description should bump requirement:

   Depends: libharfbuzz0b (>= 1.2.7)

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