Squashed 'external/devlib/' changes from b6d1863e..fa595e1a

fa595e1a version: Dev version bump
78938cf2 version: Bump revision number
4941a718 setup.py: Update project description
3ab9d23a setup.py: Add long description to package
5cf18a7b docs: Add note to hostid about PowerPc64 devices
5bfeae08 bin: update aarch64 and x86_64 busybox binaries
a87a1df0 bin/busybox: Update ppc64le busybox
3bf76368 bin/busybox: Update 32 bit busybox binaries
a5cced85 module/hotplug: Extend hotplug support with 'fail' and 'states' interfaces
9f55ae76 connection: PopenTransferManager: Reset last_sample when we start a new transfer
e7bafd6e version: Bump dev version
ca84124f doc/target: Fix Typo
1f418533 docs/target: Add new Target attributes
82a2f7d8 target: Expose hostname as target property
2a633b78 target: Expose hostid as target property

git-subtree-dir: external/devlib
git-subtree-split: fa595e1a3d202d715a14a18fb8efbfc6d09b42f9