Fixed building with a bazel with hdrs_check fixed again.

Change-Id: I015f66cd6e02e07efa367b96edd775015ac0abca
diff --git a/third_party/gflags/BUILD b/third_party/gflags/BUILD
index 532ef3f..0aec151 100644
--- a/third_party/gflags/BUILD
+++ b/third_party/gflags/BUILD
@@ -43,6 +43,7 @@
   ],
   deps = [
     '//debian:libpthread',
+    '//third_party/empty_config_h',
   ],
   copts = common_copts,
   includes = [ 'include' ],