Correct logging for function calls that return SBValueList



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@174670 91177308-0d34-0410-b5e6-96231b3b80d8
Renaming SBValueList::get() to 
opaque_ptr since it returns a void* instead of an usable object.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@174673 91177308-0d34-0410-b5e6-96231b3b80d8