RFR: 8345813: Replace $LDCXX with proper libraries to $LD instead

Mon Dec 9 16:30:13 UTC 2024

As suggested by @djelinski in https://github.com/openjdk/jdk/pull/17986#issuecomment-1965991536, we can (and should) remove the special `$LDCXX` linker, and instead just pass the C++ standard libraries to gcc.

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Commit messages:
 - 8345813: Replace $LDCXX with proper libraries to $LD instead

Changes: https://git.openjdk.org/jdk/pull/22648/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22648&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345813
  Stats: 60 lines in 9 files changed: 18 ins; 31 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/22648.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22648/head:pull/22648

PR: https://git.openjdk.org/jdk/pull/22648