RFR: 8301393: Include cdb in the Windows devkit

[Erik Joelsson]

This patch modifies the windows devkit, optionally adding the debugger tools from the Windows SDK. These tools include `cdb` which the failure_handler uses to extract information when tests time out.

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Commit messages:
 - JDK-8301393

Changes: https://git.openjdk.org/jdk/pull/12353/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12353&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301393
  Stats: 35 lines in 2 files changed: 31 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/12353.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12353/head:pull/12353

PR: https://git.openjdk.org/jdk/pull/12353