am 358907eb: (-s ours) am 3c3a7e1f: (-s ours) am 791d8f2e: Upgrading libpng to 1.2.46 to fix a few vulnerabilities. DO NOT MERGE

* commit '358907eb39a40fc6b59289f0f092c09e70085db2':
  Upgrading libpng to 1.2.46 to fix a few vulnerabilities. DO NOT MERGE