VertexLoader: avoid empty lines in perf-$pid.map

Source/Core/VideoCommon/VertexLoaderBase.cpp

@@ -120,7 +120,7 @@ void VertexLoaderBase::AppendToString(std::string *dest) const
 				i, m_VtxAttr.texCoord[i].Elements, posMode[tex_mode[i]], posFormats[m_VtxAttr.texCoord[i].Format]));
 		}
 	}
-	dest->append(StringFromFormat(" - %i v\n", m_numLoadedVertices));
+	dest->append(StringFromFormat(" - %i v", m_numLoadedVertices));
 }
 
 // a hacky implementation to compare two vertex loaders

Source/Core/VideoCommon/VertexLoaderManager.cpp

@@ -109,7 +109,8 @@ void AppendListToString(std::string *dest)
 	dest->reserve(dest->size() + total_size);
 	for (const entry& entry : entries)
 	{
-		dest->append(entry.text);
+		*dest += entry.text;
+		*dest += '\n';
 	}
 }