Support building all variants. am: 93c59c1336

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

Change-Id: Ia87567ea0e8238b6a8a0f4742c7ea7e11af0a397
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",