* gnatcmd.adb, prj-proc.adb, make.adb, mlib-prj.adb, prj.adb,
	prj.ads, makegpr.adb, makeutl.adb, clean.adb, prj-nmsc.adb,
	mlib-tgt.adb, prj-env.adb, prj-env.ads:
	(Path_Information): New record type
	Use component of type Path_Information when there are two paths, one in
	canonical format and one in display format.
	Update the project manager to these new components.

From-SVN: r136008