git: openjdk/leyden: hermetic-java-runtime: Make error() a static function in childproc.c. This is to resolve `ld: error: duplicate symbol: error` issue on hermetic Java with libjava.a and third party library.

[duke]

Changeset: e20a9155
Branch: hermetic-java-runtime
Author:    Jiangli Zhou <jianglizhou at google.com>
Date:      2024-11-11 14:14:56 +0000
URL:       https://git.openjdk.org/leyden/commit/e20a9155ae37caa5151005997fc9b4478bb2038d

Make error() a static function in childproc.c. This is to resolve `ld: error: duplicate symbol: error` issue on hermetic Java with libjava.a and third party library.

! src/java.base/unix/native/libjava/childproc.c