Add go-subcommands module.

Bug: 158031244
Test: build runextractor
Change-Id: I9e0a9d05c6e0f109693a77e14dbc682e4a20b24e
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..b5ca903
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,5 @@
+bootstrap_go_package {
+    name: "go-subcommands",
+    pkgPath: "github.com/google/subcommands",
+    srcs: ["subcommands.go"],
+}