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/elf_builder.h b/compiler/elf_builder.h
index 7f30565..273b62d 100644
--- a/compiler/elf_builder.h
+++ b/compiler/elf_builder.h
@@ -17,12 +17,12 @@
 #ifndef ART_COMPILER_ELF_BUILDER_H_
 #define ART_COMPILER_ELF_BUILDER_H_
 
+#include "arch/instruction_set.h"
 #include "base/stl_util.h"
 #include "base/value_object.h"
 #include "buffered_output_stream.h"
 #include "elf_utils.h"
 #include "file_output_stream.h"
-#include "instruction_set.h"
 
 namespace art {