ART: Enhance comment

Enhance comment about ResolveClass instantation.

Addresses comment for commit ae0b1f48ea9c65f946968cd99e34313cd2d43124.

Test: m
Change-Id: I6d2a2ad5eb938480b83a174a9f589e79ba6a0f52
diff --git a/runtime/verifier/method_verifier.cc b/runtime/verifier/method_verifier.cc
index 15cbec8..ce9deaf 100644
--- a/runtime/verifier/method_verifier.cc
+++ b/runtime/verifier/method_verifier.cc
@@ -3778,7 +3778,8 @@
   return *result;
 }
 
-// Instantiate.
+// Instantiate ResolveClass variants. This is required as the -inl file has a function with a call
+// to ResolveClass, and compilers may decide to inline, requiring a symbol.
 template const RegType& MethodVerifier::ResolveClass<MethodVerifier::CheckAccess::kNo>(
     dex::TypeIndex class_idx);
 template const RegType& MethodVerifier::ResolveClass<MethodVerifier::CheckAccess::kYes>(