GN rules for everything in //mojo

mojo/BUILD.gn

Index: mojo/BUILD.gn
diff --git a/mojo/BUILD.gn b/mojo/BUILD.gn
index 61e812316b480151ba8dcdf29dd981843e3f8980..c5b9683eb323acd2c05257946be70b3e88afa885 100644
--- a/mojo/BUILD.gn
+++ b/mojo/BUILD.gn
@@ -9,6 +9,7 @@ group("mojo") {
   testonly = true
   deps = [
     ":tests",
+    "//mojo/apps/js:mojo_js",
     "//mojo/common",
     "//mojo/examples",
     "//mojo/public",
@@ -29,6 +30,7 @@ group("tests") {
     "//mojo/application_manager:mojo_application_manager_unittests",
     "//mojo/apps/js/test:mojo_apps_js_unittests",
     "//mojo/common:mojo_common_unittests",
+    "//mojo/public/c/system/tests:perftests",
     "//mojo/public/cpp/application/tests:mojo_public_application_unittests",
     "//mojo/public/cpp/bindings/tests:mojo_public_bindings_unittests",
     "//mojo/public/cpp/environment/tests:mojo_public_environment_unittests",
@@ -39,6 +41,7 @@ group("tests") {
     "//mojo/shell:mojo_shell_tests",
     "//mojo/system:mojo_message_pipe_perftests",
     "//mojo/system:mojo_system_unittests",
+    "//mojo/tools:message_generator",
   ]
 
   if (use_aura) {