zenfone6: Build bootctrl.msmnile using Soong

This is required to build the recovery variant of the
same to be used by fastbootd.

Bug: 78793464
Test: make
Change-Id: I16eddcb853bda1a9969810f258884ebdbbfc1f5c
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..c2ab30c
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,3 @@
+soong_namespace {
+    imports: ["hardware/qcom/bootctrl"],
+}