[nemo-qml-plugin-thumbnailer] Replace separate video thumbnailer pack…

…age. JB#57202

Commit 9695503 removed the use of separate video thumbnailer .so
and started executing a separate executable.

-> Use Provides: for the functionality that's required on some packages,
and here depend on thumbnailerd that includes the executables.

rpm/nemo-qml-plugin-thumbnailer-qt5.spec

@@ -11,6 +11,8 @@ BuildRequires:  pkgconfig(Qt5Qml)
 BuildRequires:  pkgconfig(Qt5Quick)
 BuildRequires:  pkgconfig(mlite5)
 BuildRequires:  sailfish-qdoc-template
+Requires: thumbnaild
+Provides: nemo-qml-plugin-thumbnailer-qt5-video
 
 %description
 %{summary}.