compress/bzip2: use obscuretestdata.ReadFile to avoid creating temporary
The temporary was not being deleted. Not creating it at all is better.
Change-Id: Id9c5498a2f7d2f58770a09a2a76f4ab30943dd3d
Reviewed-on: https://go-review.googlesource.com/c/go/+/740780 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Joseph Tsai <joetsai@digital-static.net> Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>