Patch ping (plugins for libstdc++ purposes)

[Jakub Jelinek]

Hi!

I'd like to ping 3 patches:

https://gcc.gnu.org/pipermail/gcc-patches/2026-March/710969.html
  testsuite: Add C++ plugin to check for libstdc++ header uglification

https://gcc.gnu.org/pipermail/gcc-patches/2026-March/711023.html
  testsuite: Add plugin to verify bits/std.cc exports

https://gcc.gnu.org/pipermail/gcc-patches/2026-April/712574.html
  testsuite: Diagnose non-uglified names even in requires exprs

Thanks

	Jakub