add bazel postsubmit config
diff --git a/buildkite/pipelines/bazel-postsubmit.json b/buildkite/pipelines/bazel-postsubmit.json
new file mode 100644
index 0000000..557bac9
--- /dev/null
+++ b/buildkite/pipelines/bazel-postsubmit.json
@@ -0,0 +1,30 @@
+{
+  "git_repository": "https://github.com/bazelbuild/bazel.git",
+  "platforms": {
+    "ubuntu1404": {
+      "shell_commands": [
+        "sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^# android_ndk_repository/android_ndk_repository/' WORKSPACE",
+        "rm -f WORKSPACE.bak"
+      ],
+      "build_targets": ["//src:bazel"],
+      "test_targets": ["//scripts/... //src/test/... //third_party/ijar/... //tools/android/..."]
+    },
+    "ubuntu1604": {
+      "shell_commands": [
+        "sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^# android_ndk_repository/android_ndk_repository/' WORKSPACE",
+        "rm -f WORKSPACE.bak"
+      ],
+      "build_targets": ["//src:bazel"],
+      "test_targets": ["//scripts/... //src/test/... //third_party/ijar/... //tools/android/..."]
+    },
+    "macos": {
+      "shell_commands": [
+        "sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^# android_ndk_repository/android_ndk_repository/' WORKSPACE",
+        "rm -f WORKSPACE.bak"
+      ],
+      "build_targets": ["//src:bazel"],
+      "test_targets": ["//scripts/... //src/test/... //third_party/ijar/... //tools/android/..."]
+    },
+  }
+}
+