Support building all variants. am: 93c59c1336 am: 7942217038

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/remain/+/1355993

Change-Id: I8c7f598d716e097a2469be8fd24012f6dbe6a2a4
diff --git a/Android.bp b/Android.bp
index 5500c76..50bde3a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -5,7 +5,7 @@
     crate_name: "remain",
     srcs: ["src/lib.rs"],
     edition: "2018",
-    rlibs: [
+    rustlibs: [
         "libproc_macro2",
         "libquote",
         "libsyn",