make sure non-app common paths are canonicalized.

src/modules/filesystem/physfs/Filesystem.cpp

@@ -701,6 +701,7 @@ std::string Filesystem::getFullCommonPath(CommonPath path)
 
 #endif
 
+	fullPaths[path] = canonicalizeRealPath(fullPaths[path].c_str());
 	return fullPaths[path];
 }