Bug#1003472: owfs: fails to build with php8.1

[Bastian Germann]

Control: retitle -1 libow-php7: misnomer
Control: tags -1 - ftbfs
Control: severity -1 minor

The package should build with swig 4.1.0.
But with a build based on PHP 8, the libow-php7 package is a misnomer.