code review 5490053: runtime: make more build-friendly

src/pkg/runtime/iface.c

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 #include "runtime.h"
-#include "arch.h"
+#include "arch_GOARCH.h"
 #include "type.h"
 #include "malloc.h"
 
 enum·
 {
         // If an empty interface has these bits set in its type
         // pointer, it was copied from a reflect.Value and is
         // not a valid empty interface.
         reflectFlags = 3,
 };
@@ skipping 774 matching lines @@
         // type structure sits before the data pointer.
         t = (Type*)((Eface*)typ.data-1);
 ········
         size = n*t->size;
         if(t->kind&KindNoPointers)
                 ret = runtime·mallocgc(size, FlagNoPointers, 1, 1);
         else
                 ret = runtime·mal(size);
         FLUSH(&ret);
 }