Bump minimum hacking version to 0.9.2

Hacking 0.9.2 has a fix for the library six.
Related patch: I4e401e0fcce077f81a5471692aa6ecd16f26f6ed

Change-Id: I94ac3d6eb68f762f9bf0706a2bd9cd3b953178c8
Merge "Bump minimum hacking version to 0.9.2"