re: xsrc/50386 (xterm on m68k broken due to libX11)

[matthew green <mrg%eterna.com.au@localhost>]

> 
>  > --- src/external/mit/xorg/lib/libX11/Makefile.libx11.orig	2015-11-09 19:43:39.000000000 +0900
>  > +++ src/external/mit/xorg/lib/libX11/Makefile.libx11	2015-11-09 19:47:04.000000000 +0900
>  > @@ -265,8 +265,8 @@
>  >  	XlibInt.c \
>  >  	Xrm.c
>  >  
>  > -SRCS+=	\
>  > -	UIThrStubs.c 
>  > +#SRCS+=	\
>  > +#	UIThrStubs.c 
>  >  
>  >  SRCS+=	\
>  >  	AddDIC.c \
>  
>  I've also confirmed this fixes the problem (shell in xterm doesn't start)
>  on NetBSD/luna68k 7.0 and NetBSD/x68k 7.0.
>  
>  If no other developer handles this matter, I'll commit it to see
>  if it could cause any other unexpected side effect on the HEAD.

ah, i thought i commited this -- but apparently i only tested it
(on amd64).

please feel free to commit and request pullups.

thanks!