Add clippy-driver build rule

Depending on the location of the repository (e.g. external/, vendor/), a
different set of lints will be enabled. Add the clippy property to the
rust_* modules. This property can be used to overwrite the default
behaviour.

Test: m checkbuild
Bug: 157238651
Change-Id: Ife0f723ef4a74abb102597f8486a7b9f30e7d351
diff --git a/rust/Android.bp b/rust/Android.bp
index b06ea8e..d56de87 100644
--- a/rust/Android.bp
+++ b/rust/Android.bp
@@ -9,24 +9,26 @@
     ],
     srcs: [
         "androidmk.go",
-        "compiler.go",
-        "coverage.go",
         "binary.go",
         "builder.go",
+        "clippy.go",
+        "compiler.go",
+        "coverage.go",
         "library.go",
         "prebuilt.go",
         "proc_macro.go",
-	"project_json.go",
+        "project_json.go",
         "rust.go",
         "test.go",
         "testing.go",
     ],
     testSrcs: [
         "binary_test.go",
+        "clippy_test.go",
         "compiler_test.go",
         "coverage_test.go",
         "library_test.go",
-	"project_json_test.go",
+        "project_json_test.go",
         "rust_test.go",
         "test_test.go",
     ],