D2 changes!

Removed druntime from the repository again.. Sorry :/
Updated the druntime port a bit, now requires druntime from trunk.
Added info in runtime/README on how to get druntime from trunk.
Added patch to add LDC support to druntime.
Removed some debug logging from D2 builds.
Fixed broken typeinfo for const/invariant in D2.

druntime/import/std/stdarg.di

@@ -1,32 +0,0 @@
-/**
- * These functions are built-in intrinsics to the compiler.
- *
- * Copyright: Public Domain
- * License:   Public Domain
- * Authors:   David Friedman
- */
-module std.stdarg;
-
-version( GNU )
-{
-    private import gcc.builtins;
-    alias __builtin_va_list va_list;
-    alias __builtin_va_end  va_end;
-    alias __builtin_va_copy va_copy;
-}
-
-template va_start(T)
-{
-    void va_start( out va_list ap, inout T parmn )
-    {
-
-    }
-}
-
-template va_arg(T)
-{
-    T va_arg( inout va_list ap )
-    {
-        return T.init;
-    }
-}