2007-04-20  Robert Dewar  <dewar@adacore.com>

	* g-string.adb, s-proinf-irix-athread.adb, s-gloloc-mingw.adb,
	s-tfsetr-default.adb, gnatfind.adb, gnatxref.adb, gprep.adb,
	g-regexp.adb, g-regexp.ads, g-regpat.ads, g-tasloc.adb, g-tasloc.ads,
	output.adb, switch-m.ads, tree_in.ads, tree_io.ads, indepsw.ads,
	g-utf_32.adb, g-utf_32.ads, a-wichun.adb, a-wichun.ads, a-zchuni.adb,
	a-zchuni.ads: Replace GNAT.xxx by System.xxx when appropriate.

	* s-utf_32.adb, s-utf_32.ads, s-os_lib.adb, s-os_lib.ads, s-regexp.adb,
	s-regexp.ads, s-regpat.adb, s-regpat.ads, s-string.adb, s-string.ads,
	s-tasloc.adb, s-tasloc.ads: New files.

From-SVN: r125360