dwtest: add a flag to preserve tmp files following a test run

Add a "-keep" flag to the test that preserves the top level temp dir
to allow developers to inspect intermediate executables, etc. Helpful
for debugging test failures.

Change-Id: Ie0e729fde45e953536203b4a008aeceef7333006
Reviewed-on: https://go-review.googlesource.com/c/debug/+/504835
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
1 file changed
tree: 04bda1028b424eb44e763645d3e8488f8a44c70f
  1. cmd/
  2. dwtest/
  3. internal/
  4. codereview.cfg
  5. CONTRIBUTING.md
  6. go.mod
  7. go.sum
  8. LICENSE
  9. README.md
README.md

Go Debug

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