WAF: when the program specified by --run is not found, print a list of all available program names in the error message.
Raj Bhattarcharjea (raj.b@gatech.edu)
Gustavo Carneiro (gjc@inescporto.pt, gjcarneiro@gmail.com)
Craig Dowell (craigdo@ee.washington.edu)
Tom Henderson (tomhend@u.washington.edu)
Mathieu Lacage (mathieu.lacage@sophia.inria.fr)
George F. Riley (riley@ece.gatech.edu)