lineage: Mark generated_kernel_includes as recovery_available

Change-Id: Id4eed981e601244330a8ced1d5433254d808b3fd
diff --git a/build/soong/Android.bp b/build/soong/Android.bp
index cd9f16c..3e98349 100644
--- a/build/soong/Android.bp
+++ b/build/soong/Android.bp
@@ -42,4 +42,5 @@
     generated_headers: ["generated_kernel_includes"],
     export_generated_headers: ["generated_kernel_includes"],
     vendor_available: true,
+    recovery_available: true,
 }