cmake: Update compiler settings

[chfast]

[codecov[bot]]

Codecov Report

Merging #574 (fabf1c5) into master (b13f3d3) will increase coverage by 0.03%. The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #574      +/-   ##
==========================================
+ Coverage   97.00%   97.03%   +0.03%     
==========================================
  Files          70       70              
  Lines        6505     6505              
==========================================
+ Hits         6310     6312       +2     
+ Misses        195      193       -2     

Flag	Coverage Δ
blockchaintests	75.48% <ø> (ø)
statetests	69.50% <ø> (ø)
unittests	93.17% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
lib/evmone/instructions.hpp	100.00% <0.00%> (+0.20%)	:arrow_up:
lib/evmone/advanced_analysis.hpp	100.00% <0.00%> (+2.94%)	:arrow_up:

[axic]

@chfast still planning to merge?