[tools] Replace deprecated ioutil methods

ioutil was deprecated in Go 1.16. This change modifies tools/ to use the
new functions.

Bug: b/235863442
Change-Id: I6bcbe2a7133d8e3656ba8c3a59b2acc6da172044
Reviewed-on: https://fuchsia-review.googlesource.com/c/tools/+/712402
Fuchsia-Auto-Submit: Chris Lewis <cflewis@google.com>
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
Reviewed-by: Yuping Zhai <yupingz@google.com>
4 files changed
tree: acd88d989c393683f80cabc3467ba76422a521ff
  1. buildidtool/
  2. debugsyms/
  3. gndoc/
  4. .gitignore
  5. go.mod
  6. go.sum
  7. manifest
  8. README.md


All tools have been moved to fuchsia.git at https://fuchsia.googlesource.com/fuchsia/+/refs/heads/master/tools.