Adding Bazel BUILD files for yang subsystem.

Change-Id: I957cc95d56eb2ddf6906fa4a396ce2556b9b5e86
diff --git a/apps/yang/web/BUILD b/apps/yang/web/BUILD
new file mode 100644
index 0000000..8d3a0a1
--- /dev/null
+++ b/apps/yang/web/BUILD
@@ -0,0 +1,15 @@
+COMPILE_DEPS = CORE_DEPS + JACKSON + REST + ONOS_YANG + [
+  "@jersey_media_multipart//jar",
+  "@onos_yang_runtime//jar",
+  "//apps/yang:onos-apps-yang",
+]
+
+osgi_jar_with_tests(
+    api_description = "REST API for YANG Runtime",
+    api_package = "org.onosproject.yang.web",
+    api_title = "YANG Runtime",
+    api_version = "1.0",
+    deps = COMPILE_DEPS,
+    test_deps = TEST_ADAPTERS,
+    web_context = "/onos/yang",
+)
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