archive/tar, compress/bzip2: base64 some troublesome testdata files
This avoids complaints from scanners that look for and open
tar and bz2 files, and complain if they look weird.
In this case, they do look weird, because they are intentionally strange.
This kind of thing shouldn't be necessary, but we already have the machinery
to do it so it's easy enough.
Fixes #76799
Change-Id: Ib302b3aef30108a1325f91fcb2d166f8e1863792
Reviewed-on: https://go-review.googlesource.com/c/go/+/729780 Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Joseph Tsai <joetsai@digital-static.net>