Use EXTERNAL_REFERENCE instead of RUNTIME_ENTRY for deoptimization entries for ARM and MIPS

src/assembler.h

Index: src/assembler.h
===================================================================
--- src/assembler.h	(revision 13624)
+++ src/assembler.h	(working copy)
@@ -345,7 +345,8 @@
 
   // Read/modify the code target in the branch/call instruction
   // this relocation applies to;
-  // can only be called if IsCodeTarget(rmode_) || rmode_ == RUNTIME_ENTRY
+  // can only be called if IsCodeTarget(rmode_) || rmode_ == RUNTIME_ENTRY ||
+  // rmode_ == EXTERNAL_REFERENCE
   INLINE(Address target_address());
   INLINE(void set_target_address(Address target,
                                  WriteBarrierMode mode = UPDATE_WRITE_BARRIER));