message: Fix a bug in thread local reloations
  There was a bug (also uncovered via binutils) where R_X86_64_DTPOFF64 is
  set uncorrectly. This program is the minimal reproducer of the seg fault
  #include <errno.h>
  int main() {
  int oerrno = errno;
  }
  But it works after the bug fix.
diff: @@ -666,7 +666,7 @@ impl Linker {
  set_u64(tm as u64);
  }
  reloc::R_X86_64_DTPOFF64 => {
  - set_u64((s + a) as u64);
  + set_u64(rel.r_offset as u64);
  }
  reloc::R_X86_64_GLOB_DAT | reloc::R_X86_64_JUMP_SLOT => {
  set_u64(s as u64);
  