Bug#983843: xrdp FTBFS on several architectures

["Thierry Fauck@linux.ibm.com" <thierry@linux.ibm.com>]

At least that problem on ppc machines is due to fact that ppc64el is not 
taken in account properly

A patch could be

 diff xrdp-0.9.12/common/arch.h xrdp-bad/common/arch.h
64a65,70
> #if defined(__LITTLE_ENDIAN__)
> #define L_ENDIAN
> #else
> #define B_ENDIAN
> #endif
>
68,69c74,75
<     (defined(__PPC__) && defined(__BIG_ENDIAN__)) || \
<     (defined(__ppc__) && defined(__BIG_ENDIAN__))
---
>     defined(__PPC__) || \
>     defined(__ppc__)
82,83c88
<     (defined(__PPC__) && defined(__BIG_ENDIAN__)) || \
<     (defined(__ppc__) && defined(__BIG_ENDIAN__))
---
>     defined(__PPC__) || defined(__ppc__)