Merge ~ubuntu-core-dev/ubuntu-seeds/+git/platform:focal-btrfs-tools into ~ubuntu-core-dev/ubuntu-seeds/+git/platform:focal

[Brian Murray]

I happened to be looking at current build logs and noticed the following in https://launchpadlibrarian.net/585322389/buildlog_ubuntu_focal_arm64_ubuntu_BUILDING.txt.gz

? Unknown live-common package: btrfs-tools

btrfs-tools was replaced with btrfs-progs and while the seeds were update for Groovy (0bf38b61919340d2c5827da462615c096e1599c6) they were not for Focal which also needed an update.

[Steve Langasek (vorlon)]

review: Approve

diff --git a/live-common b/live-common
index 74e69e4..8587a07 100644
--- a/live-common
+++ b/live-common
@@ -4,7 +4,7 @@ Ubiquity needs full filesystem support for the partitioner.
  * jfsutils
  * hfsplus [powerpc]  # ColinWatson
  * reiserfsprogs
- * btrfs-tools
+ * btrfs-progs
  * ntfs-3g
  * lvm2
  * dmraid