[PATCH libXext] man: using the C preprocessor is not required for man pages.

[Alan Coopersmith]

Gaetan Nadon wrote:
> There were no special symbols needing cpp.
> Everything can be handled by the default MAN_SUBSTS in util-macros.

I don't remember if we ever had a reason we used cpp instead of sed there,
certainly it seems to make no difference now.

Reviewed-by: Alan Coopersmith <alan.coopersmith at oracle.com>

-- 
	-Alan Coopersmith-        alan.coopersmith at oracle.com
	 Oracle Solaris Platform Engineering: X Window System