[Patch] Fix MIPS build failure caused by -Werror=undef

[Maciej W. Rozycki]

On Fri, 13 Feb 2015, Steve Ellcey  wrote:

> The recent change to use -Werror=undef on assembly language files
> caused a build failure on MIPS.  GCC defines __MIPSEB only in
> big-endian mode and leaves it undefined in little endian mode (where
> it defines __MIPSEL instead).
[...]
> 2015-02-13  Steve Ellcey  <sellcey@imgtec.com>
> 
> 	* sysdeps/mips/bits/endian.h (__MIPSEB): Use #ifdef instead of #if.
> 	* sysdeps/mips/memcpy.S (__MIPSEB): Ditto.
> 	* sysdeps/mips/memset.S (__MIPSEB): Ditto.
> 
> 
> diff --git a/sysdeps/mips/bits/endian.h b/sysdeps/mips/bits/endian.h
> index 9586104..43ce009 100644
> --- a/sysdeps/mips/bits/endian.h
> +++ b/sysdeps/mips/bits/endian.h
> @@ -5,7 +5,7 @@
>  # error "Never use <bits/endian.h> directly; include <endian.h> instead."
>  #endif
>  
> -#if __MIPSEB
> +#ifdef __MIPSEB
>  # define __BYTE_ORDER __BIG_ENDIAN
>  #endif
>  #if __MIPSEL

   ^^^^^^^^^^^^
 Don't we need a complementing change for __MIPSEL here then too?

  Maciej