Make dl_iterate_phdr return correct name for first entry

Test: bionic-unit-tests --gtest_filter=link*
Change-Id: Ib3f1e0fbc76fed9a5f27ffdd9bbf847a3e8d3665
diff --git a/linker/linker.h b/linker/linker.h
index ae1ae3c..43d345c 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -100,7 +100,7 @@
 
 void count_relocation(RelocationKind kind);
 
-soinfo* get_libdl_info(const char* linker_path);
+soinfo* get_libdl_info(const char* linker_path, const link_map& linker_map);
 
 soinfo* find_containing_library(const void* p);