Fix typo in BsFoo tag comment.

Test: pass
Change-Id: I0bd72bac6f64edca993ee8f2012247fd6da31884
diff --git a/base/include/hidl/HidlInternal.h b/base/include/hidl/HidlInternal.h
index 9b9457f..d81dd9c 100644
--- a/base/include/hidl/HidlInternal.h
+++ b/base/include/hidl/HidlInternal.h
@@ -37,7 +37,7 @@
 // tag for proxy interfaces (e.x. BpHwFoo)
 struct bphw_tag {};
 
-// tag for server interfaces (e.x. BsFoo)
+// tag for passthrough interfaces (e.x. BsFoo)
 struct bs_tag {};
 
 //Templated classes can use the below method