Support relative encoded dex locations in oat files.

Now when opening an oat file, the caller can pass an absolute dex
location used to resolve the absolute path for any relative
encoded dex locations in the oat file.

Bug: 19550105
Change-Id: I6e9559afe4d86ac12cf0b90176b5ea696a83d0e7
diff --git a/runtime/runtime.cc b/runtime/runtime.cc
index 0728646..8945fd6 100644
--- a/runtime/runtime.cc
+++ b/runtime/runtime.cc
@@ -692,7 +692,7 @@
     return false;
   }
   std::unique_ptr<OatFile> oat_file(OatFile::OpenWithElfFile(elf_file.release(), oat_location,
-                                                             &error_msg));
+                                                             nullptr, &error_msg));
   if (oat_file.get() == nullptr) {
     LOG(INFO) << "Unable to use '" << oat_filename << "' because " << error_msg;
     return false;