Add RmTemps, which is the really quite version of Clean.

[SVN r33474]

v2/tools/common.jam

@@ -387,8 +387,9 @@ rule get-program-files-dir ( )
 
 if [ os.name ] = NT
 {
-    RM = del /f ;
+    RM = del /f /q ;
     CP = copy ;
+    IGNORE = "2>nul >nul & setlocal" ;
 }
 else
 {
@@ -546,6 +547,14 @@ actions copy
     $(CP) "$(>)" "$(<)"
 }
 
+rule RmTemps
+{
+}
+actions quietly updated piecemeal together RmTemps
+{
+    $(RM) "$(>)" $(IGNORE)
+}
+
 rule __test__ ( ) {
 
     import assert ;