dumpkey: add back to build for zip verification support

Change-Id: I2cdf10e94b45a27ef58f9d915efc1f42305ccd9f
diff --git a/tools/dumpkey/Android.bp b/tools/dumpkey/Android.bp
new file mode 100644
index 0000000..d2feb93
--- /dev/null
+++ b/tools/dumpkey/Android.bp
@@ -0,0 +1,27 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+java_library_host {
+    name: "dumpkey",
+
+    manifest: "DumpPublicKey.mf",
+
+    static_libs: [
+        "bouncycastle-host",
+    ],
+
+    srcs: [
+        "DumpPublicKey.java",
+    ],
+}