gnustep-config macro should be guarded against output of Make

[Mathias Bauer]

Hi,

if a Makefile containing a call to gnustep-config is called with "-C" 
option, it prints out messages for entering/leaving a directory. This 
gets forwarded to the Make call inside of gnustep-config and this spoils 
its output (and of course breaks the build).

This should be fixed by adding "--no-print-directory" to the Make calls 
in gnustep-config.in, e.g.

> --objc-flags) @GNUMAKE@ --no-print-directory -s -f "$GNUSTEP_MAKEFILES/empty.make" 
> print-gnustep-make-objc-flags quiet=yes 2>/dev/null

and some more places in that file.

Would that be acceptable?

Regards,
Mathias