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/ijar/Android.bp b/tools/ijar/Android.bp
new file mode 100644
index 0000000..f7e9a28
--- /dev/null
+++ b/tools/ijar/Android.bp
@@ -0,0 +1,20 @@
+// Copyright 2015 The Android Open Source Project
+//
+// The rest of files in this directory comes from
+// https://github.com/bazelbuild/bazel/tree/master/third_party/ijar
+
+cc_binary_host {
+    srcs: [
+        "classfile.cc",
+        "ijar.cc",
+        "zip.cc",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    host_ldlibs: ["-lz"],
+    name: "ijar",
+    // libc++ is not supported for TARGET_BUILD_APPS builds
+    stl: "libstdc++",
+}