Allow mixing of thread offsets between 32 and 64bit architectures.

Begin a more full implementation x86-64 REX prefixes.
Doesn't implement 64bit thread offset support for the JNI compiler.

Change-Id: If9af2f08a1833c21ddb4b4077f9b03add1a05147
diff --git a/disassembler/disassembler_arm.cc b/disassembler/disassembler_arm.cc
index 55fd52f..899aa78 100644
--- a/disassembler/disassembler_arm.cc
+++ b/disassembler/disassembler_arm.cc
@@ -305,7 +305,7 @@
           }
           if (rn.r == 9) {
             args << "  ; ";
-            Thread::DumpThreadOffset(args, offset, 4);
+            Thread::DumpThreadOffset<4>(args, offset);
           }
         }
       }
@@ -1291,7 +1291,7 @@
               args << Rt << ", [" << Rn << ", #" << imm12 << "]";
               if (Rn.r == 9) {
                 args << "  ; ";
-                Thread::DumpThreadOffset(args, imm12, 4);
+                Thread::DumpThreadOffset<4>(args, imm12);
               } else if (Rn.r == 15) {
                 intptr_t lit_adr = reinterpret_cast<intptr_t>(instr_ptr);
                 lit_adr = RoundDown(lit_adr, 4) + 4 + imm12;
@@ -1304,7 +1304,7 @@
               args << Rt << ", [" << Rn << ", #" << imm12 << "]";
               if (Rn.r == 9) {
                 args << "  ; ";
-                Thread::DumpThreadOffset(args, imm12, 4);
+                Thread::DumpThreadOffset<4>(args, imm12);
               } else if (Rn.r == 15) {
                 intptr_t lit_adr = reinterpret_cast<intptr_t>(instr_ptr);
                 lit_adr = RoundDown(lit_adr, 4) + 4 + imm12;
@@ -1361,7 +1361,7 @@
             args << Rt << ", [" << Rn << ", #" << imm12 << "]";
             if (Rn.r == 9) {
               args << "  ; ";
-              Thread::DumpThreadOffset(args, imm12, 4);
+              Thread::DumpThreadOffset<4>(args, imm12);
             } else if (Rn.r == 15) {
               intptr_t lit_adr = reinterpret_cast<intptr_t>(instr_ptr);
               lit_adr = RoundDown(lit_adr, 4) + 4 + imm12;