Instruction set features for ARM64, MIPS and X86.

Also, refactor how feature strings are handled so they are additive or
subtractive.
Make MIPS have features for FPU 32-bit and MIPS v2. Use in the quick compiler
rather than #ifdefs that wouldn't have worked in cross-compilation.
Add SIMD features for x86/x86-64 proposed in:
  https://android-review.googlesource.com/#/c/112370/

Bug: 18056890

Change-Id: Ic88ff84a714926bd277beb74a430c5c7d5ed7666
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index ac4fc67..63bf96c 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -17,9 +17,9 @@
 #ifndef ART_COMPILER_OPTIMIZING_CODE_GENERATOR_H_
 #define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_H_
 
+#include "arch/instruction_set.h"
 #include "base/bit_field.h"
 #include "globals.h"
-#include "instruction_set.h"
 #include "locations.h"
 #include "memory_region.h"
 #include "nodes.h"