runtime: repair slice, string, and channel printing in gdb

"Something" changed the names of types in gdb, causing the
pretty-printer matchers to fail to match.  This tracks that
change.

Updated runtime-gdb_test.go to include a slice and a channel printing test.

(The straightforward printing of a slicevar doesn't work because
of compiler DWARF problems describing the slicevar, not gdb problems).

Change-Id: I21607a955b9c894f11ecf3763aea2a6dd59a3f42
Reviewed-on: https://go-review.googlesource.com/c/go/+/235926
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2 files changed
tree: 10b20ff21009248a090ffd32965ec0730bbbf7e5
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. CONTRIBUTING.md
  12. CONTRIBUTORS
  13. favicon.ico
  14. LICENSE
  15. PATENTS
  16. README.md
  17. robots.txt
  18. SECURITY.md
README.md

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