DAHDI master build diversification

* we never really wanted to build against fixed tags but branches, i.e.
  "the latest tag within a given stable series", so switch from a fixed
  tag like "v5.10" in torvalds/linux.git to "linux-5.10.y" in stable/linux.git

* we also want to build against 6.1.y, as that is what upcoming Debian
  bookworm will ship

Change-Id: Ibc0527a6f7d11c4f99c19e73c948b9baacd4e5a2
1 file changed