Import Debian changes 9.1.2-1

fontawesomefx (9.1.2-1) unstable; urgency=medium

  * New upstream version 9.1.2.
    - New build system: Gradle
  * Switch to compat level 11.
  * Declare compliance with Debian Policy 4.2.1.
  * Build-depend on libopenjfx-java instead of openjfx.
  * Fix FTBFS with OpenJFX 11. (Closes: #893194)
  * Remove get-orig-source target.
  * Add build.patch and use Debian's system libraries.
  * Install all icon font jars. Update the package description accordingly.