Upgrade libpng used for Splashscreen from 1.6.47 to 1.6.51 version. -------------
Commit messages: - Update - update .md file - 8372534: Update Libpng to 1.6.51 Changes: https://git.openjdk.org/jdk/pull/28518/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28518&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8372534 Stats: 638 lines in 21 files changed: 297 ins; 207 del; 134 mod Patch: https://git.openjdk.org/jdk/pull/28518.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/28518/head:pull/28518 PR: https://git.openjdk.org/jdk/pull/28518
