Add prometheus label to build info

[creativeprojects]

Add the profile label, and any other label from the configuration to the resticprofile_build_info metric

Fixes: #318

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (9eba431) 78.94% compared to head (1ae0396) 78.94%.

Files	Patch %	Lines
monitor/prom/progress.go	0.00%	4 Missing ⚠️
monitor/prom/metrics.go	97.37%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #319      +/-   ##
==========================================
- Coverage   78.94%   78.94%   -0.01%     
==========================================
  Files         101      101              
  Lines        9717     9713       -4     
==========================================
- Hits         7671     7667       -4     
  Misses       1764     1764              
  Partials      282      282              

Flag	Coverage Δ
unittests	78.94% <88.37%> (-0.01%)	⬇️

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[Javex]

Amazing! You're quick! I just rolled it out on one server and ran it. No more log errors from node_exporter! I will keep it on just one server and monitor this PR for any issues that might come up until a new version is released.

Thanks for such a quick fix, that's a massive help!