[jdk15u-dev] RFR: 8250863: Build error with GCC 10 in NetworkInterface.c and k_standard.c

[Yuri Nesterenko]

Need to backport this change prepared by  Yasumasa Suenaga  to fix the build with gcc 10.3.

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Commit messages:
 - Backport e3c6574ac042642a5b30b96b945d86e709ba2a6b

Changes: https://git.openjdk.org/jdk15u-dev/pull/223/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=223&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8250863
  Stats: 9 lines in 2 files changed: 6 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk15u-dev/pull/223.diff
  Fetch: git fetch https://git.openjdk.org/jdk15u-dev pull/223/head:pull/223

PR: https://git.openjdk.org/jdk15u-dev/pull/223