[Temp] Fix ANGLE's hash after ab6d5f16.

I read https://chromium.googlesource.com/angle/angle/+/chromium/2062
wrong and used the "tree" hash instead of the actual commit hash.

Big pointy hat to me.
Merge pull request #182 from rakuco/fix-angle-roll

[Temp] Fix ANGLE's hash after ab6d5f16.