Mark broken for -stable too.

:
cc -c -O2 -pipe -Idevelhdrs xc_builtins.c
xc_builtins.c:37: X11/Xlib.h: No such file or directory
xc_builtins.c:38: X11/Xutil.h: No such file or directory
xc_builtins.c:39: X11/Xresource.h: No such file or directory
xc_builtins.c:101: parse error before `*'
xc_builtins.c:148: parse error before `*'
: