[SharedCache] Fix parsing of Objective-C metadata

8267ab4 introduced a logic error in
VirtualMemoryReader::ReadPointer that caused VirtualMemoryReader to
attempt to read pointers from the wrong address, breaking parsing of
Objective-C metadata.

Author: bdash

view/sharedcache/core/VirtualMemory.cpp

@@ -265,7 +265,7 @@ uint64_t VirtualMemoryReader::ReadPointer()
 
 uint64_t VirtualMemoryReader::ReadPointer(uint64_t address)
 {
-	m_cursor = m_memory->GetAddressSize();
+	m_cursor = address + m_addressSize;
 	return m_memory->ReadPointer(address);
 }