Use cc_generator_options = "lite" for config protos in GN build.

CB-108

Change-Id: I3d8d09da22cd32f6fd5464fd34a4b458546abbd0
diff --git a/config/BUILD.gn b/config/BUILD.gn
index fc6fab5..bf471f1 100644
--- a/config/BUILD.gn
+++ b/config/BUILD.gn
@@ -15,12 +15,7 @@
   import_dirs = [ "//third_party/protobuf/src" ]
   generate_python = false
   generate_go = (current_toolchain == host_toolchain)
-
-  # TODO(rudominer) Uncomment this line so that we can use Protobuf Lite
-  # in Fuchsia. In order to do this we need to replace the use of
-  # TextFormat with some other way of parsing a message from a human-readable
-  # string.
-  # cc_generator_options = "lite"
+  cc_generator_options = "lite"
 
   deps = [
     "//third_party/cobalt:cobalt_proto",