I think like others packages in your system, when you do a update
sudo apt-get install librepilot
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
linux-headers-4.4.0-31 linux-headers-4.4.0-31-generic linux-image-4.2.0-42-generic linux-image-4.4.0-31-generic
linux-image-extra-4.2.0-42-generic linux-image-extra-4.4.0-31-generic
Use 'sudo apt autoremove' to remove them.
The following packages will be upgraded:
librepilot
1 upgraded, 0 newly installed, 0 to remove and 203 not upgraded.
Need to get 42,4 MB of archives.
After this operation, 843 kB of additional disk space will be used.
Get:1 http://ppa.launchpad.net/librepilot/release/ubuntu xenial/main amd64 librepilot amd64 16.09-0xenial1 [42,4 MB]
77% [1 librepilot 40,9 MB/42,4 MB 96%] Fetched 42,4 MB in 21s (1 974 kB/s)
(Reading database ... 277925 files and directories currently installed.)
Preparing to unpack .../librepilot_16.09-0xenial1_amd64.deb ...
Unpacking librepilot (16.09-0xenial1) over (15.09+r957~gd7ebf30-0xenial1) ...