[gcc] Created tag 'releases/gcc-15.1.0'

[GCC Administrator via Gcc-cvs]

The signed tag 'releases/gcc-15.1.0' was created pointing to:

 1b306039ac49... Update ChangeLog and version files for release

Tagger: Jakub Jelinek <ja...@redhat.com>
Date: Fri Apr 25 08:21:15 2025 +0000

    GCC 15.1.0 release