Share srcs in rust_defaults am: 36d7307a9c

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bitflags/+/1365688

Change-Id: I9966b73504a99bde6d7a05aec1b5d0af822bc597
diff --git a/Android.bp b/Android.bp
index 0f5a227..30e65f1 100644
--- a/Android.bp
+++ b/Android.bp
@@ -3,6 +3,8 @@
 rust_defaults {
     name: "bitflags_defaults",
     crate_name: "bitflags",
+    // has rustc warnings
+    srcs: ["src/lib.rs"],
     test_suites: ["general-tests"],
     auto_gen_config: true,
     edition: "2015",
@@ -17,15 +19,11 @@
 rust_test_host {
     name: "bitflags_host_test_src_lib",
     defaults: ["bitflags_defaults"],
-    // has rustc warnings
-    srcs: ["src/lib.rs"],
 }
 
 rust_test {
     name: "bitflags_device_test_src_lib",
     defaults: ["bitflags_defaults"],
-    // has rustc warnings
-    srcs: ["src/lib.rs"],
 }
 
 rust_library {