[Buildroot] [PATCH v2 0/2] support/testing: test_podman.py : fix build failure due to regressions

[Dowan Gullient]

This serie fixes the build failure of Podman tests caused by the bump to the AArch64 15.2.rel1 
toolchain (including newer glibc and GCC 15) which introduced a regression in the build process of
host-protobuf v34.0, which is a dependency for Podman tests (header inclusion and inlining rules
enforced by GCC 15).

It also bumps the kernel to 6.18.21 to match the new configuration and adds a fragment to fix iptables 
"Protocol not supported" error when running Podman tests.

Dowan Gullient (1):
  support/testing: test_podman.py : Build failure due to bump of
    toolchain

Julien Olivain (1):
  package/libabseil-cpp: add patch to fix build with gcc <= 12

 ...SL_ATTRIBUTE_WARN_UNUSED-with-gcc-12.patch | 55 +++++++++++++++++++
 support/testing/tests/package/test_podman.py  |  5 +-
 .../package/test_podman/linux-podman.fragment | 36 ++++++++++++
 3 files changed, 94 insertions(+), 2 deletions(-)
 create mode 100644 package/libabseil-cpp/0002-base-fix-ABSL_ATTRIBUTE_WARN_UNUSED-with-gcc-12.patch
 create mode 100644 support/testing/tests/package/test_podman/linux-podman.fragment

-- 
2.43.0

---
v1 -> v2:
  - Included Julien Olivain's toolchain fix (originally from 
    https://patchwork.ozlabs.org/project/buildroot/patch/20260427201606.896700-1-ju.o@free.fr/)
  - Added linux-podman.fragment to fix iptables "Protocol not supported"
  - Bumped kernel to 6.18.21 to match the new configuration