ART: Allow to compile interpret-only mips64 files

Include enough infrastructure to allow cross-compiling for mips64,
interpret-only. This includes the instruction-set-features, frame
size info and utils assembler.

Also add a disassembler for oatdump, and support in patchoat.

Note: the runtime cannot run mips64, yet.

Change-Id: Id106581fa76b478984741c62a8a03be0f370d992
diff --git a/build/Android.gtest.mk b/build/Android.gtest.mk
index 8180ce8..efb45c7 100644
--- a/build/Android.gtest.mk
+++ b/build/Android.gtest.mk
@@ -90,6 +90,7 @@
   runtime/arch/arm/instruction_set_features_arm_test.cc \
   runtime/arch/arm64/instruction_set_features_arm64_test.cc \
   runtime/arch/mips/instruction_set_features_mips_test.cc \
+  runtime/arch/mips64/instruction_set_features_mips64_test.cc \
   runtime/arch/x86/instruction_set_features_x86_test.cc \
   runtime/arch/x86_64/instruction_set_features_x86_64_test.cc \
   runtime/barrier_test.cc \