Gaetan Nadon authored Jan 07, 2010 and Keith Packard committed Jan 07, 2010

User can defined alternate location for pkg-config.
Once option in place, all instances of pkg-config must be converted.

Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Dan Nicholson <dbn.lists@gmail.com>
Signed-off-by: Gaetan Nadon <memsize@videotron.ca>
Signed-off-by: Keith Packard <keithp@keithp.com>