Fix problems with sandboxing and the ARM integrated assembler.

src/DartARM32/assembler_arm.h

Index: src/DartARM32/assembler_arm.h
diff --git a/src/DartARM32/assembler_arm.h b/src/DartARM32/assembler_arm.h
index 2ded00df9c9d79aab8e6f8938d3a88001d6ad09c..c0d224ea1627ce880d21340a051fae40d3bb35ad 100644
--- a/src/DartARM32/assembler_arm.h
+++ b/src/DartARM32/assembler_arm.h
@@ -594,9 +594,10 @@ class Assembler : public ValueObject {
 
   // Miscellaneous instructions.
   void clrex();
+#if 0
+  // Moved to ARM32::AssemblerARM32::nop().
   void nop(Condition cond = AL);
 
-#if 0
   // Moved to ARM32::AssemblerARM32::bkpt()
   // Note that gdb sets breakpoints using the undefined instruction 0xe7f001f0.
   void bkpt(uint16_t imm16);