[jdk15u-dev] RFR: 8247818: GCC 10 warning stringop-overflow with symbol code

[Yuri Nesterenko]

backporting this useful fix which is already in mainstream for long time.
There may be added an additional issue to make gcc10 happy though...

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Commit messages:
 - Backport ed31b661d35a72948af6cf117cccea2e7537b920

Changes: https://git.openjdk.org/jdk15u-dev/pull/271/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk15u-dev&pr=271&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8247818
  Stats: 8 lines in 2 files changed: 0 ins; 7 del; 1 mod
  Patch: https://git.openjdk.org/jdk15u-dev/pull/271.diff
  Fetch: git fetch https://git.openjdk.org/jdk15u-dev pull/271/head:pull/271

PR: https://git.openjdk.org/jdk15u-dev/pull/271