Add radio HAL stub to the build list; fix format warning.

Test: it builds
Change-Id: Id093441b9909f564d30f8351931ee3ccf55f2617
diff --git a/modules/radio/radio_hw.c b/modules/radio/radio_hw.c
index fbf8c94..09f07b1 100644
--- a/modules/radio/radio_hw.c
+++ b/modules/radio/radio_hw.c
@@ -189,7 +189,7 @@
 exit:
     close(fd);
     free(data);
-    ALOGE_IF(ret != 0, "%s error %d", __func__, ret);
+    ALOGE_IF(ret != 0, "%s error %d", __func__, (int)ret);
     return (int)ret;
 }