Temporary disable DL_WARNs for unused DT_*

Bug: 17552334
Change-Id: I2f7b5e4b4d1db96e812a7f86adc929e113d4c11a
diff --git a/linker/linker.cpp b/linker/linker.cpp
index 6dfa768..f11cfdb 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -2053,7 +2053,7 @@
 
       default:
         if (!relocating_linker) {
-          DL_WARN("%s: unused DT entry: type %p arg %p", name,
+          DEBUG("%s: unused DT entry: type %p arg %p", name,
               reinterpret_cast<void*>(d->d_tag), reinterpret_cast<void*>(d->d_un.d_val));
         }
         break;