[fx] add fargo.fx metadata file

Change-Id: I05e574ce015b547acf10452601f980e2e5e37eca
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/377954
Reviewed-by: Renato Mangini Dias <mangini@google.com>
Reviewed-by: Rob Tsuk <robtsuk@google.com>
Testability-Review: David Reveman <reveman@google.com>
Commit-Queue: David Reveman <reveman@google.com>
diff --git a/tools/devshell/fargo.fx b/tools/devshell/fargo.fx
new file mode 100755
index 0000000..e14b570
--- /dev/null
+++ b/tools/devshell/fargo.fx
@@ -0,0 +1,10 @@
+# Copyright 2020 The Fuchsia Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+#### CATEGORY=Build
+#### EXECUTABLE=${PREBUILT_3P_DIR}/fargo/${HOST_PLATFORM}/fargo
+### Fargo is a prototype Fuchsia-specific wrapper around Cargo
+## usage: run `fx fargo help`
+##
+## Or check https://fuchsia.googlesource.com/fargo/+/refs/heads/master/README.md for more information