Switch some build tools to Soong

In preparation for including them in prebuilts/build-tools.

acp: We use a prebuilt in prebuilts/sdk, but it's not part of the sdk.

ijar: We use the host libstdc++ to workaround the lack of libc++ on
some unbundled branches.

ziptime: We disable this on unbundled builds, due to the lack of libc++.

Change-Id: Ib9766b1dbddd151c38ff27c529865200ab37fce1
diff --git a/tools/ziptime/Android.bp b/tools/ziptime/Android.bp
new file mode 100644
index 0000000..874d346
--- /dev/null
+++ b/tools/ziptime/Android.bp
@@ -0,0 +1,36 @@
+//
+// Copyright 2015 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.
+//
+
+//
+// Zip timestamp removal tool
+//
+
+cc_binary_host {
+
+    srcs: [
+        "ZipTime.cpp",
+        "ZipEntry.cpp",
+        "ZipFile.cpp",
+    ],
+
+    name: "ziptime",
+    target: {
+        windows: {
+            enabled: true,
+        },
+    },
+
+}