Add entries in root.bp for hidl/hwbinder

Change-Id: I8dd0f8585dc8214c43983112bd6b8e109ac030af
diff --git a/root.bp b/root.bp
index 12ca162..95f089b 100644
--- a/root.bp
+++ b/root.bp
@@ -24,6 +24,10 @@
     "system/core/*",
     "system/extras/*",
     "system/keymaster",
+    "system/hwservicemanager",
+    "system/libhidl",
+    "system/libhwbinder",
     "system/media/*",
     "system/security/*",
+    "system/tools/*",
 ]