Upgrade elfutils to elfutils-0.181

Test: make
Change-Id: Ia66b73a4087b3e50689b212f85d78c0c7f8c53e1
diff --git a/METADATA b/METADATA
index c5179a8..cfb5987 100644
--- a/METADATA
+++ b/METADATA
@@ -9,11 +9,11 @@
     type: GIT
     value: "git://sourceware.org/git/elfutils.git"
   }
-  version: "elfutils-0.179"
+  version: "elfutils-0.181"
   license_type: RESTRICTED
   last_upgrade_date {
     year: 2020
-    month: 3
-    day: 30
+    month: 9
+    day: 23
   }
 }