Allow .rs.h extension when including generated header
diff --git a/demo-rs/BUCK b/demo-rs/BUCK
index eac4182..d4164d3 100644
--- a/demo-rs/BUCK
+++ b/demo-rs/BUCK
@@ -36,7 +36,7 @@
 cxx_library(
     name = "include",
     exported_headers = {
-        "src/main.rs": ":gen-header",
+        "src/main.rs.h": ":gen-header",
     },
     visibility = ["PUBLIC"],
 )