Snapd updates in Fedora

[mborzecki]

I’ve submitted updates of snapd to 2.51.7, which includes a compatibility fix for squashfs tools 4.5+. Please test and post karma:

• Fedora 35 (branched): https://bodhi.fedoraproject.org/updates/FEDORA-2021-87c0fbffd3
• Fedora 34: https://bodhi.fedoraproject.org/updates/FEDORA-2021-7654a1c2c7
• Fedora 33: https://bodhi.fedoraproject.org/updates/FEDORA-2021-a63594f15e