Dissolve gerrit-war top-level directory

Change-Id: I2eaa09545e2ac8ef8f1346ab0cb203d00f811a38
diff --git a/webapp/BUILD b/webapp/BUILD
new file mode 100644
index 0000000..f907be9
--- /dev/null
+++ b/webapp/BUILD
@@ -0,0 +1,12 @@
+load("//tools/bzl:genrule2.bzl", "genrule2")
+
+genrule2(
+    name = "assets",
+    srcs = glob(
+        ["**/*"],
+        exclude = ["BUILD"],
+    ),
+    outs = ["assets.zip"],
+    cmd = "cd webapp; zip -qr $$ROOT/$@ .",
+    visibility = ["//visibility:public"],
+)