Merge "Add a phony target for all Rust targets" am: 40fa08bfa7

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/1775370

Change-Id: I1a90eda9535cbbd09ca07360dcd201e30be7ba2e

rust/rust.go

@@ -861,6 +861,8 @@ func (mod *Module) GenerateAndroidBuildActions(actx android.ModuleContext) {
 		if mod.installable(apexInfo) {
 			mod.compiler.install(ctx)
 		}
+
+		ctx.Phony("rust", ctx.RustModule().OutputFile().Path())
 	}
 }