kbfs-2.11.0-bp155.4.9

- Update to using Go 1.15 for builds

- Switch to Go 1.14 as Go 1.16 breaks the build

- Modernise spec file

- BuildRequire pkgconfig(systemd) instead of systemd: allow OBS to
  shortcut through the -mini flavors.

- Upgrade to version 2.11.0
  * The server will never be involved for unmerged MDs when the
    user is running a journal.
- Updated ensure-service-stop-unmounts-filesystem.patch.

- Upgrade to version 2.10.1
  * This solves an issue with Git operations leaking disk cache.

- Add ensure-service-stop-unmounts-filesystem.patch: Ensures the
  Keybase Filesystem is properly unmounted when stopping the kbfs
  service.

- Add README.SUSE files to explaining how to get started in using
  these packages.
- Dropped the upstream README that only contains information
  relevant for people building from source.

- Initial package version
  * Provides the core Keybase Filesystem.
  * Provides the KBFS CLI tool.
  * Provides the Git remote helper for the kebase protocol.
  * Does not include the rebinder which makes the filesystem
    available at /keybase.