This update includes the GNU Compiler Collection 9.

This update ships the GCC 9.3 release.

A full changelog is provided by the GCC team on:

https://www.gnu.org/software/gcc/gcc-9/changes.html

The base system compiler libraries libgcc_s1, libstdc++6 and others are
now built by the gcc 9 packages.

To use it, install "gcc9" or "gcc9-c++" or other compiler brands and use CC=gcc-9 /
CXX=g++-9 during configuration for using it.

Security issues fixed:

- CVE-2019-15847: Fixed a miscompilation in the POWER9 back end, that optimized multiple calls of the __builtin_darn intrinsic into a single call. (bsc#1149145)
- CVE-2019-14250: Fixed a heap overflow in the LTO linker. (bsc#1142649)

Non-security issues fixed:

- Split out libstdc++ pretty-printers into a separate package supplementing gdb and the installed runtime. (bsc#1135254)
- Fixed miscompilation for vector shift on s390. (bsc#1141897)
- Includes a fix for Internal compiler error when building HepMC (bsc#1167898)
- Includes fix for binutils version parsing
- Add libstdc++6-pp provides and conflicts to avoid file conflicts
with same minor version of libstdc++6-pp from gcc10.
- Add gcc9 autodetect -g at lto link (bsc#1149995)
- Install go tool buildid for bootstrapping go