[jdk11u-dev] RFR: 8336291: [11u] update for deprecated sprintf for jdk.pack

[Antonio Vieiro]

This fixes [JDK-8336291](https://bugs.openjdk.org/browse/JDK-8336291) by replacing the deprecated `sprintf` with `snprintf` in different files `jdk.pack`. Low risk.

This is a 11u specific issue, as `jdk.pack` was removed in [JDK-8234596](https://bugs.openjdk.org/browse/JDK-8234596)  in OpenJDK 14.

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Depends on: https://git.openjdk.org/jdk11u-dev/pull/2849

Commit messages:
 - [11u] update for deprecated sprintf for jdk.pack

Changes: https://git.openjdk.org/jdk11u-dev/pull/2853/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2853&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8336291
  Stats: 17 lines in 5 files changed: 1 ins; 0 del; 16 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2853.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2853/head:pull/2853

PR: https://git.openjdk.org/jdk11u-dev/pull/2853