First two codegen tests passing on SIMMIPS

runtime/vm/disassembler_mips.cc

Index: runtime/vm/disassembler_mips.cc
===================================================================
--- runtime/vm/disassembler_mips.cc	(revision 20729)
+++ runtime/vm/disassembler_mips.cc	(working copy)
@@ -141,7 +141,8 @@
     case 'd': {
       ASSERT(STRING_STARTS_WITH(format, "dest"));
       int off = instr->SImmField() << 2;
-      uword destination = reinterpret_cast<uword>(instr) + off;
+      uword destination =
+          reinterpret_cast<uword>(instr) + off + Instr::kInstrSize;
       buffer_pos_ += OS::SNPrint(current_position_in_buffer(),
                                  remaining_size_in_buffer(),
                                  "%#"Px"",
@@ -377,6 +378,10 @@
       Format(instr, "bgez 'rs, 'dest");
       break;
     }
+    case BGEZAL: {
+      Format(instr, "bgezal 'rs, 'dest");
+      break;
+    }
     case BGEZL: {
       Format(instr, "bgezl 'rs, 'dest");
       break;