rpmbuild - add build timestamp to rpm package name

[SiskaPavel]

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 40.87%. Comparing base (f616af2) to head (1e3b7c6). Report is 53 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #214      +/-   ##
==========================================
- Coverage   40.89%   40.87%   -0.03%     
==========================================
  Files         102      102              
  Lines        9659     9659              
  Branches     1425     1425              
==========================================
- Hits         3950     3948       -2     
- Misses       4867     4869       +2     
  Partials      842      842              

Flag	Coverage Δ
tests	40.87% <ø> (-0.03%)	:arrow_down:

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