clean.adb (Clean_Archive): Use untouched casing for the archive name and the corresponding .deps file.

2007-04-20  Pascal Obry  <obry@adacore.com>

	* clean.adb (Clean_Archive): Use untouched casing for the archive name
	and the corresponding .deps file.
	(Clean_Interface_Copy_Directory): Use untouched casing for the library
	src directory. Minor code-clean-up. Use untouched casing for files
	read into the library src dir.
	(Clean_Library_Directory): Idem.
	(Parse_Cmd_Line): Accept new switch -aP

From-SVN: r125389