[foreign-memaccess+abi] RFR: Fix a couple of CI build problems

[Jorn Vernee]

- Statically link the C++ standard library into libTestAsyncStackWalk to avoid linking error when running.
- Specify exception handling semantics for libTestAsyncStackWalk on Windows to avoid warning.

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Commit messages:
 - Statically link the C++ standard library into libTestAsyncStackWalk

Changes: https://git.openjdk.java.net/panama-foreign/pull/561/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=561&range=00
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/561.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/561/head:pull/561

PR: https://git.openjdk.java.net/panama-foreign/pull/561