ARM: Use ubfx and movw instructions to avoid a PC-relative load on

src/disassembler.cc

Index: src/disassembler.cc
===================================================================
--- src/disassembler.cc	(revision 10578)
+++ src/disassembler.cc	(working copy)
@@ -150,6 +150,7 @@
                      *reinterpret_cast<int32_t*>(pc));
         constants = num_const;
         pc += 4;
+#ifndef V8_TARGET_ARCH_ARM
       } else if (it != NULL && !it->done() && it->rinfo()->pc() == pc &&
           it->rinfo()->rmode() == RelocInfo::INTERNAL_REFERENCE) {
         // raw pointer embedded in code stream, e.g., jump table
@@ -159,6 +160,7 @@
                      ptr,
                      ptr - begin);
         pc += 4;
+#endif
       } else {
         decode_buffer[0] = '\0';
         pc += d.InstructionDecode(decode_buffer, pc);