gcc security update

gcc [el8]
[8.5.0-18.0.5]

• CVE-2023-4039 GCC mitigation.
  Orabug 35751743.
  Includes removal of aarch64-preserve-args.patch.
• CVE-2022-40982 ‘Intel Downfall’ mitigation.
  Orabug 35751810.
  Add two patches originally from GCC upstream releases/gcc-11 branch.
  with major adjustment.
  gcc11-downfall-disable-gather-in-vec.patch
  gcc11-downfall-support-mno-gather.patch
  Reviewed-by: Jose E. Marchesi
  gcc [el9]
  [11.3.1-4.3.0.4]
• CVE-2023-4039 GCC mitigation.
  Orabug 35751837.
• CVE-2022-40982 ‘Intel Downfall’ mitigation.
  Orabug 35751842.
  Add two patches originally from GCC upstream releases/gcc-11 branch.
  gcc11-downfall-disable-gather-in-vec.patch
  gcc11-downfall-support-mno-gather.patch
  Reviewed-by: Jose E. Marchesi
  gcc-toolset-11-gcc [el8]
  [11.2.1-9.1.0.6]
• CVE-2023-4039 GCC mitigation.
  Orabug 35751885.
• CVE-2022-40982 ‘Intel Downfall’ mitigation.
  Orabug 35751901.
  Add two patches originally from GCC upstream releases/gcc-11 branch.
  gcc11-downfall-disable-gather-in-vec.patch
  gcc11-downfall-support-mno-gather.patch
  Reviewed-by: Jose E. Marchesi
  gcc-toolset-12-gcc [el8/el9]
  [12.2.1-7.4.0.2]
• CVE-2023-4039 GCC mitigation.
  Orabug 35751931.
• CVE-2022-40982 ‘Intel Downfall’ mitigation.
  Orabug 35751938.
  Add two patches originally from GCC upstream releases/gcc-11 branch.
  gcc12-downfall-disable-gather-in-vec.patch
  gcc12-downfall-support-mno-gather.patch
• Introduce ‘oracle_release’ into .spec file. Echo it to gcc/DEV-PHASE.