snames.adb: New standard name Excluded_Source_List_File

snames.adb: New standard name Excluded_Source_List_File

2008-05-23  Vincent Celier  <celier@adacore.com>

	* snames.adb:
	New standard name Excluded_Source_List_File

	* snames.ads:
	New standard name Excluded_Source_List_File

	* prj-attr.adb:
	New project level attribute Excluded_Source_List_File

	* prj-nmsc.adb:
	(Find_Excluded_Sources): New parameter Project.
	Get excluded sources from
	file indicated by attribute Excluded_Source_List_File, when present and
	neither Excluded_Source_Files nor Locally_Removed_Files are declared.

From-SVN: r135809