Update OS X packaging scripts to use cmake

[su_v]

Current packaging scripts for OS X application bundle are based on autotools.
Add cmake support (optional) or switch to cmake for upcoming release 0.92.

* Build dependencies (possibly add variants for autotools and cmake):
https://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/view/head:/packaging/macosx/ports/devel/inkscape-packaging/Portfile

* Port option '--enable-osxapp' from configure.ac to cmake:
 option(ENABLE_OSX_APP_LOCATIONS "compile with OSX .app data dir paths" OFF)
in
https://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/view/head:/CMakeLists.txt

* Packaging script to modify:
https://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/view/head:/packaging/macosx/osx-build.sh

* Add cmake support for generated files used with application bundle:
https://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/view/head:/Info.plist.in
and possibly others.

[Qantas94Heavy (qantas94heavy)]

0.92 macOS packaging scripts were never updated to use cmake. This should be fixed in 1.0 as part of the native app packaging efforts: https://gitlab.com/inkscape/inkscape/issues/84

[Qantas94Heavy (qantas94heavy)]

This issue has now been migrated to GitLab, please follow this link for further tracking of this issue: https://gitlab.com/inkscape/inkscape/issues/84