Add elfutils via DEPS.

DEPS

 # This file is automatically processed to create .DEPS.git which is the file
 # that gclient uses under git.
 #
 # See http://code.google.com/p/chromium/wiki/UsingGit
 #
 # To test manually, run:
 #   python tools/deps2git/deps2git.py -o .DEPS.git -w <gclientdir>
 # where <gcliendir> is the absolute path to the directory containing the
 # .gclient file (the parent of "src").
 #
@@ skipping 509 matching lines @@
       "/trunk/deps/third_party/findbugs@245039",
 
     "src/third_party/freetype":
       Var("chromium_git") + "/chromium/src/third_party/freetype.git" +
       "@a2b9955b49034a51dfbc8bf9f4e9d312149cecac",
 
     "src/third_party/guava/src":
       Var("chromium_git") + "/external/guava-libraries.git" +
       "@c523556ab7d0f05afadebd20e7768d4c16af8771",
 
+   "src/third_party/elfutils/src":
+      Var("chromium_git") + "/external/elfutils.git" +
+      "@43a97297be82feab4b3176a094ed701ad3ccb308",
+
     "src/third_party/httpcomponents-client":
       "/trunk/deps/third_party/httpcomponents-client@170888",
 
     "src/third_party/httpcomponents-core":
       "/trunk/deps/third_party/httpcomponents-core@170888",
 
     "src/third_party/jarjar":
       "/trunk/deps/third_party/jarjar@170888",
 
     "src/third_party/jsr-305/src":
@@ skipping 222 matching lines @@
                 "-s", "src/build/linux/bin/eu-strip.sha1",
     ],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "name": "gyp",
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]