ADDED: with cmake KICAD_MACOSX_APP_BUNDLE option the user can disable
the macOS app bundle creation when compiling on macOS. This permit to
use/install KiCad like any other *nix platform (/usr/bin, /usr/share,
ecc.). By default, cmake build the app bundle.
The opencascade patch intrusively checked against libraries but broke
some build scripts. This restores the default cmake OCE behavior that was
changed by 2bab30d9a and makes the OpenCascade search truly secondary.