MIPS: Print register names instead of register numbers in disassembler

Test: ./testrunner.py --optimizing --target on CI20 and in QEMU
Test: mma test-art-host-gtest

Change-Id: I1fc375ae34ee8fd994192705c45d8f30a35dfc56
diff --git a/disassembler/disassembler.cc b/disassembler/disassembler.cc
index 8eecc62..5af51c1 100644
--- a/disassembler/disassembler.cc
+++ b/disassembler/disassembler.cc
@@ -40,8 +40,10 @@
     return new arm::DisassemblerArm(options);
   } else if (instruction_set == kArm64) {
     return new arm64::DisassemblerArm64(options);
-  } else if (instruction_set == kMips || instruction_set == kMips64) {
-    return new mips::DisassemblerMips(options);
+  } else if (instruction_set == kMips) {
+    return new mips::DisassemblerMips(options, /* is_o32_abi */ true);
+  } else if (instruction_set == kMips64) {
+    return new mips::DisassemblerMips(options, /* is_o32_abi */ false);
   } else if (instruction_set == kX86) {
     return new x86::DisassemblerX86(options, false);
   } else if (instruction_set == kX86_64) {