Support building all variants.

Bug: 143217452
Test: cd external/rust; mma; atest in all TEST_MAPPING subdirs
Change-Id: Ieaeb33bb33b65e55865bb7f10b2c3d4f9aeda930
diff --git a/Android.bp b/Android.bp
index c5a61b4..627f4b4 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,11 +1,12 @@
 // This file is generated by cargo2android.py --run --dependencies --features=.
 
-rust_library_host_rlib {
+rust_library {
     name: "libclap",
     crate_name: "clap",
+    host_supported: true,
     srcs: ["src/lib.rs"],
     edition: "2015",
-    rlibs: [
+    rustlibs: [
         "libbitflags",
         "libtextwrap",
         "libunicode_width",