Propagate InstructionSetFeatures to ElfBuilder.

This is subset of CL171665 and it separates it into two.
It will be needed to generate .MIPS.abiflags ELF section.

Change-Id: I5557e7cb98d0fa1dc57c85cf6161e119c6d50a1a
diff --git a/compiler/elf_writer_quick.h b/compiler/elf_writer_quick.h
index 347d372..3d5dd39 100644
--- a/compiler/elf_writer_quick.h
+++ b/compiler/elf_writer_quick.h
@@ -26,8 +26,10 @@
 namespace art {
 
 class CompilerOptions;
+class InstructionSetFeatures;
 
 std::unique_ptr<ElfWriter> CreateElfWriterQuick(InstructionSet instruction_set,
+                                                const InstructionSetFeatures* features,
                                                 const CompilerOptions* compiler_options,
                                                 File* elf_file);