build/make: set LOCAL_NATIVE_BENCHMARK for Google Benchmark Test

Set LOCAL_NATIVE_BENCHMARK to true. Then, build system can use it
to auto generate the related Test config file of Google Benchmark
Test

Bug:74844131
Test: Use mm to rebuild any module in cc_benchmark
Change-Id: I6a8f1ff78f7aec3f4eb17e218845f0cdf3f57f32

cc/androidmk.go

@@ -243,6 +243,7 @@ func (benchmark *benchmarkDecorator) AndroidMk(ctx AndroidMkContext, ret *androi
 			fmt.Fprintln(w, "LOCAL_COMPATIBILITY_SUITE :=",
 				strings.Join(benchmark.Properties.Test_suites, " "))
 		}
+		fmt.Fprintln(w, "LOCAL_NATIVE_BENCHMARK := true")
 	})
 
 	androidMkWriteTestData(benchmark.data, ctx, ret)