Exit normally when relocations are already packed.

Bug: http://b/18051137
Change-Id: Idfffac5fe965e3cdeabe6d3b2dcd8c275c6ae5df
diff --git a/tools/relocation_packer/src/elf_file.cc b/tools/relocation_packer/src/elf_file.cc
index fb74233..c8ddde6 100644
--- a/tools/relocation_packer/src/elf_file.cc
+++ b/tools/relocation_packer/src/elf_file.cc
@@ -618,8 +618,8 @@
   typedef typename ELF::Rela Rela;
 
   if (has_android_relocations_) {
-    LOG(ERROR) << "Relocation table is already packed";
-    return false;
+    LOG(INFO) << "Relocation table is already packed";
+    return true;
   }
 
   // If no relocations then we have nothing packable.  Perhaps