valgrind: Made Wine compliant will latest Valgrind macros (the one removed from 3.3.0 and deprecated since 3.2.0).

These need to include their array part so use var->type instead of 
var->ref->type.

rpcrt4: Set pStubMsg->BufferMark in NdrConformantVaryingArrayUnmarshall and NdrVaryingArrayUnmarshall.

pStubMsg->BufferMark should always be set before
EmbeddedPointerUnmarshall is called and these functions didn't
previously do so.

To more closely match native format; this is required for windbg.