Comment 1 for bug 1539338

Found the cause. It was this update:

android-headers (23-0ubuntu1) xenial; urgency=medium

  * New upstream release which now includes multiple sets of header files
    divided by the Android API levels we care about.
  * All header sets are now installed in their corresponding debian package
    android-headers-<API level>. The former android-headers package is now
    a transitional one depending on android-headers-19 and installing proper
    symlinks to allow all current users to still build without any changes.
  * Install proper pkgconfig configuration files for all header sets so that
    users can now select which of those to use a build time.

 -- Simon Fels <email address hidden> Mon, 11 Jan 2016 08:50:59 +0100