Update ElfWriterMclinker for klp

(cherry picked from commit a6263af9aea65c65744bdd845fed68c4814e9514)

Change-Id: I3eb9fee8afb1ef12aae4c87770882afee637971d
diff --git a/compiler/elf_writer_mclinker.h b/compiler/elf_writer_mclinker.h
index 5da178c..fa7e9ca 100644
--- a/compiler/elf_writer_mclinker.h
+++ b/compiler/elf_writer_mclinker.h
@@ -29,6 +29,7 @@
 class LDSymbol;
 class Linker;
 class LinkerConfig;
+class LinkerScript;
 class Module;
 }  // namespace mcld
 
@@ -74,6 +75,7 @@
 
   // Setup by Init()
   UniquePtr<mcld::LinkerConfig> linker_config_;
+  UniquePtr<mcld::LinkerScript> linker_script_;
   UniquePtr<mcld::Module> module_;
   UniquePtr<mcld::IRBuilder> ir_builder_;
   UniquePtr<mcld::Linker> linker_;