[Bug libgcc/113850] condition variables timed wait does a lot of spurious wakeups on Win32 threading implementation

[matteo at mitalia dot net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113850

--- Comment #1 from Matteo Italia <matteo at mitalia dot net> ---
Created attachment 57372
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57372&action=edit
Proposed patch