sys: add import comments.

Change-Id: I0ebbb4f2da41bea7871f893332f2e4847b1bfefa
Reviewed-on: https://go-review.googlesource.com/1241
Reviewed-by: Andrew Gerrand <adg@golang.org>
3 files changed
tree: 52817981b39ed94b256238a49e37d815077a9927
  1. plan9/
  2. unix/
  3. windows/
  4. .gitignore
  5. AUTHORS
  6. CONTRIBUTORS
  7. LICENSE
  8. PATENTS
  9. README