[PATCH] libstdc++: Update Linux/sparc64 baselines for GCC 15.1

[Jonathan Wakely]

On Tue, 22 Apr 2025 at 08:28, Rainer Orth <ro@cebitec.uni-bielefeld.de> wrote:
>
> The Linux/sparc64 libstdc++ baselines haven't been updated for years.
> This patch fixes that.
>
> Tested on sparc64-unknown-linux-gnu on both the gcc-15 branch and trunk.
>
> Ok for both?

This adds:

+TLS:8:_ZSt11__once_call@@GLIBCXX_3.4.11
+TLS:8:_ZSt15__once_callable@@GLIBCXX_3.4.11

For the other linux targets we don't include those in the baselines.