Add creachadair-shell module

Bug: 158031244
Test: build runextractor
Change-Id: I3d3dd9f45315bb44a9290029467aaf08ffd6d941
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..11bf072
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,8 @@
+// Needed by Go runextractor.
+bootstrap_go_package {
+    name: "creachadair-shell",
+    pkgPath: "bitbucket.org/creachadair/shell",
+    srcs: [
+        "shell.go",
+    ],
+}