bug#24720: Performance impact of -no-pie

[Eli Zaretskii]

> From: Alex <agrambot@gmail.com>
> Date: Tue, 18 Oct 2016 22:41:02 -0600
> Cc: Paul Eggert <eggert@cs.ucla.edu>, 24720@debbugs.gnu.org
> 
> I can see what the CFLAGS are in src/Makefile, thanks. Though it might
> be nice if I could see these at the Elisp level even when they're the
> default.

The default switches are known, so they don't need to be spelled out
in the report.  It's the non-default ones that needs to be shown.