Fix dependency on libtool's helper script make_hashed_objlist.py.

This should now get appropriately embedded into @bazel_tools.

--
MOS_MIGRATED_REVID=134319465

src/BUILD

diff --git a/src/BUILD b/src/BUILD
index af59d9b..c13767d 100644
--- a/src/BUILD
+++ b/src/BUILD
@@ -101,7 +101,7 @@
     srcs = [
         "//src/tools/xcode/actoolwrapper:actoolwrapper",
         "//src/tools/xcode/ibtoolwrapper:ibtoolwrapper",
-        "//src/tools/xcode/libtool:libtool",
+        "//src/tools/xcode/libtool:libtool_srcs",
         "//src/tools/xcode/momcwrapper:momcwrapper",
         "//src/tools/xcode/swiftstdlibtoolwrapper:swiftstdlibtoolwrapper",
         "//src/tools/xcode/environment:environment_plist",