Adding Bazel BUILD files for yang subsystem.

Change-Id: I957cc95d56eb2ddf6906fa4a396ce2556b9b5e86
diff --git a/apps/yang-gui/BUILD b/apps/yang-gui/BUILD
new file mode 100644
index 0000000..66f862a
--- /dev/null
+++ b/apps/yang-gui/BUILD
@@ -0,0 +1,22 @@
+COMPILE_DEPS = CORE_DEPS + JACKSON + ONOS_YANG + [
+    "@onos_yang_runtime//jar",
+    "//apps/yang:onos-apps-yang",
+]
+
+osgi_jar_with_tests (
+    deps = COMPILE_DEPS,
+    resources_root = "src/main/resources",
+    resources = glob(["src/main/resources/**"]),
+)
+
+onos_app (
+    category = "GUI",
+    description = "Adds GUI extension that allows the operator to view the list of currently " +
+        "registered YANG models, and their YANG sources. It also provides means for compiling " +
+        "source YANG files (*.yang, *.zip, *.jar) on the fly and directly from the GUI using " +
+        "drag-n-drop.<p/>User can simply compress a set of YANG source files and drop it on the " +
+        "YANG Models GUI view to automatically compile and then register the compiled YANG models.",
+    required_apps = [ "org.onosproject.yang" ],
+    title = "YANG Runtime GUI",
+    url = "http://onosproject.org",
+)