Add automake/autoconf to OSX builders. NOTE: must be before autoconf2…

…13 to link properly.
servo · bors-servo · Nov 25, 2015 · Nov 25, 2015 · Nov 25, 2015 · 91a1a447d5ffde7c6904c6a0457515c9a994a6df
commit 91a1a447d5ffde7c6904c6a0457515c9a994a6df
diff --git a/servo-dependencies.sls b/servo-dependencies.sls
@@ -24,6 +24,7 @@ servo-darwin-homebrew-versions-dependencies:
   module.run:
     - name: pkg.install
     - pkgs:
+      - automake
       - autoconf213
     - taps:
       - homebrew/versions