[build] add a pkgfs.gni for soft-transitions
This gni enables us to move where the pkgfs binary is built and what it is
called, without having to hard-transition with //build.
Test: manual, with new //build change.
Change-Id: Icb29369f549400bf72a2fa33cd670de83d73d178
diff --git a/build/pkgfs.gni b/build/pkgfs.gni
new file mode 100644
index 0000000..9b4cbb6
--- /dev/null
+++ b/build/pkgfs.gni
@@ -0,0 +1,13 @@
+# Copyright 2019 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.
+
+# pkgfs.gni provides a stable contract between //garnet and //build to tell
+# //build/images in particular where to find the pkgsvr binary. This file
+# primarily exists to aid in transitions where pkgsvr source or packages are
+# moved/changed.
+
+# The label that will produce a package containing bin/pkgsvr, the pkgfs binary.
+pkgfs_package_label = "//garnet/go/src/pmd:pkgsvr"
+# The name of the binary withing the pkgfs package that hosts pkgfs (pkgsvr).
+pkgfs_binary_name = "pkgsvr"
