Add rockrobo-vacuum-a10 to mdns discovery list

[rytilahti]

Fixes #1108

[codecov-commenter]

Codecov Report

Merging #1110 (302aac2) into master (924cb07) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1110   +/-   ##
=======================================
  Coverage   76.07%   76.07%           
=======================================
  Files          75       75           
  Lines        8722     8722           
  Branches      747      747           
=======================================
  Hits         6635     6635           
  Misses       1905     1905           
  Partials      182      182           

Impacted Files	Coverage Δ
miio/discovery.py	48.61% <ø> (ø)

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