[Bug libgcc/114646] libgcc's gthr.h still defines GTHREAD_USE_WEAK to 1 for newer glibc

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114646

--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 57906
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57906&action=edit
A patch

I am testing this.