Drone: fixing ASAN

[sdarwin]

ASAN often requires privileged access.

This PR is overly simplified, setting privileged: true on all linux jobs. You should modify the function and set privileged: true when necessary.

The randomize_va_space setting was discovered on stackoverflow, and may help. It can also be isolated to apply to ASAN jobs instead of everything.

Any repos that need this specific update should contact me and request the Drone setting "Trusted". I have also modified cppalliance/decimal.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.52%. Comparing base (9db7af7) to head (ff2b1e3).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #211   +/-   ##
========================================
  Coverage    94.52%   94.52%           
========================================
  Files           66       66           
  Lines         8459     8459           
========================================
  Hits          7996     7996           
  Misses         463      463           

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