vendor: add dropbox/dropbox-sdk-go-unofficial

vendor/github.com/dropbox/dropbox-sdk-go-unofficial/generator/generate-sdk.sh

@@ -0,0 +1,26 @@
+#! /usr/bin/env bash
+set -euo pipefail
+
+if [[ $# -ne 0 ]]; then
+    echo "$0: Not expecting any command-line arguments, got $#." 1>&2
+    exit 1
+fi
+
+loc=$(realpath -e $0)
+base_dir=$(dirname "$loc")
+spec_dir="$base_dir/dropbox-api-spec"
+gen_dir=$(dirname ${base_dir})/dropbox
+
+stone -v -a :all go_types.stoneg.py "$gen_dir" "$spec_dir"/*.stone
+stone -v -a :all go_client.stoneg.py "$gen_dir" "$spec_dir"/*.stone
+
+# Update SDK and API spec versions
+sdk_version="1.0.0-beta"
+pushd ${spec_dir}
+spec_version=$(git rev-parse --short HEAD)
+popd
+
+sed -i.bak -e "s/UNKNOWN SDK VERSION/${sdk_version}/" \
+    -e "s/UNKNOWN SPEC VERSION/${spec_version}/" ${gen_dir}/sdk.go
+rm ${gen_dir}/sdk.go.bak
+goimports -l -w ${gen_dir}