Automatic update for snapd-2.45.3.1-1.fc33.

Changelog

* Tue Aug  4 2020 Maciek Borzecki <maciek.borzecki@gmail.com> - 2.45.3.1-1
- Release 2.45.3.1 to Fedora (RHBZ#1861024)
- Fix FTBFS in Rawhide (RHBZ#1865496)
* Sat Aug  1 2020 Fedora Release Engineering <releng@fedoraproject.org> - 2.45.2-3
- Second attempt - Rebuilt for
  https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
* Wed Jul 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 2.45.2-2
- Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
* Tue Jul 28 2020 Samuele Pedroni <pedronis@lucediurna.net>
- New upstream release, LP: #1875071
  - o/ifacestate: fix bug in snapsWithSecurityProfiles
  - tests/main/selinux-clean: workaround SELinux denials triggered by
    linger setup on Centos8
* Mon Jul 27 2020 Zygmunt Krynicki <me@zygoon.pl>
- New upstream release, LP: #1875071
  - many: backport _writable_defaults dir changes
  - tests: fix incorrect check in smoke/remove test
  - cmd/snap-bootstrap,seed: backport of uc20 PRs
  - tests: avoid exit when nested type var is not defined
  - cmd/snap-preseed: backport fixes
  - interfaces: optimize rules of multiple connected iio/i2c/spi plugs
  - many: cherry-picks for 2.45, gh-action, test fixes
  - tests/lib: account for changes in arch package file name extension
  - postrm, snap-mgmt: cleanup modules and other cherry-picks
  - snap-confine: don't die if a device from sysfs path cannot be
    found by udev
  - data/selinux: update policy to allow forked processes to call
    getpw*()
  - tests/main/interfaces-time-control: exercise setting time via date
  - interfaces/builtin/time-control: allow POSIX clock API
  - usersession/userd: add "slack" to the white list of URL schemes
    handled by xdg-open