[infra] Update Go to 1.10.3

Bug: skia:
Change-Id: I3437830069de5ff8ace21115024396120d21b2a0
Reviewed-on: https://skia-review.googlesource.com/145482
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
3 files changed