[Bug target/80881] Implement Windows native TLS

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80881

--- Comment #111 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
The bug also occurs with just:

#include <stdio.h>

__thread int i = 1;

int main (void)
{
  printf ("This must be 1 after the colon: %d", i);
  return 0;
}

compiled with -fdata-sections.