Setup package builds

[stgraber]

No description provided.

[stgraber]

@MathieuBordere this will generate source package builds every time something is merged in master. I'll then have a script fetch the artifacts and automatically sign and upload those to https://launchpad.net/~dqlite/+archive/ubuntu/dev/+packages

[codecov-commenter]

Codecov Report

Merging #238 (2c8c67b) into master (4b641de) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #238      +/-   ##
==========================================
+ Coverage   87.70%   87.74%   +0.03%     
==========================================
  Files         107      107              
  Lines       15276    15276              
  Branches     2359     2359              
==========================================
+ Hits        13398    13404       +6     
+ Misses       1698     1693       -5     
+ Partials      180      179       -1     

Impacted Files	Coverage Δ
test/integration/test_uv_append.c	98.97% <0.00%> (+0.34%)	⬆️
src/uv_send.c	94.88% <0.00%> (+1.57%)	⬆️
test/fuzzy/test_liveness.c	100.00% <0.00%> (+1.58%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4b641de...2c8c67b. Read the comment docs.