Log Message:
adobe-flash-player: update to 28.0.0.137.

Upstream announcement:

 https://helpx.adobe.com/security/products/flash-player/apsb18-01.html

Adobe Security Bulletin
 Security updates available for Flash Player | APSB18-01

 Summary
  Adobe has released security updates for Adobe Flash Player for Windows,
  Macintosh, Linux and Chrome OS. These updates address an important
  out-of-bounds read vulnerability that could lead to information exposure.