Update go to 1.8.2

Since we cache the cipd files in isolate to save a lot of speed on RPIs,
it is no longer necessary to stop compressing our cipd packages.
It only saved us a few seconds on extracting anyway, which is now likely
lost because of the extra download times.
(https://skia-review.googlesource.com/c/16490)

Bug: skia:
NOTRY=true
Change-Id: Ib9b1a29088cddc8790a685935995b0fce07d864f
Reviewed-on: https://skia-review.googlesource.com/17799
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
4 files changed