[jdk13u-dev] RFR: 8238388: libj2gss/NativeFunc.o "multiple definition" link errors with GCC10

[Yuri Nesterenko]

Need to have it in 13u, too. Clean backport.

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Commit messages:
 - Backport 03721247d8f3d6b2aefe2826a59c10fd1fad51cb

Changes: https://git.openjdk.org/jdk13u-dev/pull/362/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk13u-dev&pr=362&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8238388
  Stats: 6 lines in 2 files changed: 3 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk13u-dev/pull/362.diff
  Fetch: git fetch https://git.openjdk.org/jdk13u-dev pull/362/head:pull/362

PR: https://git.openjdk.org/jdk13u-dev/pull/362