gcc-9 9.4.0-1ubuntu2 source package in Ubuntu

Changelog

gcc-9 (9.4.0-1ubuntu2) impish; urgency=medium

  * Update to git 20210814 from the gcc-9 branch.
    - Fix PR target/94780 (MIPS), PR target/100182 (x86),
      PR target/101129 (PPC), PR rtl-optimization/99927, PR target/101175 (x86),
      PR target/100871 (S390), PR d/96435, PR d/101640, PR d/101490,
      PR d/101441, PR d/101127, PR d/100967, PR d/90651, PR d/100964,
      PR d/100935, PR d/100882, PR fortran/100949, PR fortran/100227,
      PR fortran/99839, PR libstdc++/91488, PR sanitizer/101749,
      PR libstdc++/101866, PR libstdc++/101510, PR libstdc++/88881,
      PR libstdc++/88881, PR libstdc++/96657, PR libstdc++/101034,
      PR libstdc++/90415, PR libstdc++/92156, PR libstdc++/100982,
      PR libstdc++/95833, PR libstdc++/100630, PR libstdc++/100384,
      PR libstdc++/99006, PR libstdc++/91488.
  * Ada: Keep the alternate stack size at 16 * 1024, and don't rely on
    the MINSIGSTKSZ constant removed in glibc 2.34.

 -- Matthias Klose <email address hidden>  Sat, 14 Aug 2021 11:42:52 +0200