[PATCH v15 0/9] MR7111: support building Wine with LTO

[Konstantin Demin (＠rockdrilla)]

relevant bug reports:
- https://bugs.winehq.org/show_bug.cgi?id=41712
- https://bugs.winehq.org/show_bug.cgi?id=51051

--
  v15: tools: add LTO quirks
       makedep: support skipping/disabling LTO
       configure: enable building Wine with LTO
       makedep: support LTO builds
       winegcc: support LTO builds
       winebuild: support LTO builds
       tools: helper functions for LTO builds
       ntdll: add attribute "used" to a few symbols that shouldn't be discarded
       loader: add attribute "used" to a few symbols that shouldn't be discarded

https://gitlab.winehq.org/wine/wine/-/merge_requests/7111