Mac project changes -- link with MSLDropInRuntime, instead of MSLShLibRuntime, and fix link order. Also clean up the prefix file mess.

rdf/macbuild/rdf.prefix

@@ -1,4 +1,2 @@
-#include "DefinesMac.h"
-#include "DefinesMozilla.h"
-#include "IDE_Options.h"
-#include "ansi_prefix.mac.h"
+
+#include "MacPrefix.h"

rdf/macbuild/rdfDebug.prefix

@@ -1,6 +1,3 @@
-#define DEBUG
+#define DEBUG		1
 
-#include "DefinesMac.h"
-#include "DefinesMozilla.h"
-#include "IDE_Options.h"
-#include "ansi_prefix.mac.h"
+#include "MacPrefix_debug.h"