libsForQt5.libopenshot-audio: migrate to libraries

pkgs/top-level/qt5-packages.nix

···
 
   packagekit-qt = callPackage ../tools/package-management/packagekit/qt.nix { };
 
-  libopenshot-audio = callPackage ../applications/video/openshot-qt/libopenshot-audio {
+  libopenshot-audio = callPackage ../development/libraries/libopenshot-audio {
     inherit (pkgs.darwin.apple_sdk.frameworks) Accelerate AGL Cocoa Foundation;
   };