PPC/s390: [sysroot installer] Disable for host arch PPC/s390

Since PPC/s390 doesn't have the sysroot files available
on google storage, disabling it so that the script doesn't
cause gclient sync to fail when run on PPC/s390.

R=agrieve@chromium.org

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2382883003
Cr-Commit-Position: refs/heads/master@{#422014}


CrOS-Libchrome-Original-Commit: d572de4bd07f6018017e705d4dd024d4b0ad82ad
1 file changed
tree: 789ae21376a3b7dd76a7c1e1a4b5af86868dccab
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/