Use Elf32_Addr instead of unsigned in linker

Change-Id: I52dcbb4b0ff0a4052e0ad7a9bbeb2df65c9d2f66
diff --git a/linker/linker.h b/linker/linker.h
index cef6905..a9ed116 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -90,8 +90,8 @@
   char name[SOINFO_NAME_LEN];
   const Elf32_Phdr* phdr;
   int phnum;
-  unsigned entry;
-  unsigned base;
+  Elf32_Addr entry;
+  Elf32_Addr base;
   unsigned size;
 
   int unused;  // DO NOT USE, maintained for compatibility.