Hi,
  When we (Cavium) has been testing aarch64 on bigendian, we noticed
that errno sometimes was not being set correctly.  The problem is that
the store to errno was being a 64bit rather than the correct 32bit so
the value that was being loaded later on from errno was just 0.

OK?  Build and tested on aarch64-linux-gnu and aarch64_be-linux-gnu
without any regressions.

Thanks,ports/sysdeps/unix/sysv/linux/aarch64/sysdep.h
Andrew Pinski

ChangeLog:
* sysdeps/unix/sysv/linux/aarch64/sysdep.h (SYSCALL_ERROR_HANDLER):
Fix store to errno to use 32bits.

PS I don't have git write access.