Update built to 0.7.7

[bmwiedemann]

Update built to 0.7.7 for lukaslueg/built#80
to make reproducible builds easier.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.11%. Comparing base (3c3a26f) to head (325f266).
Report is 38 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3412      +/-   ##
==========================================
- Coverage   88.52%   82.11%   -6.42%     
==========================================
  Files          89       89              
  Lines       28323    27345     -978     
==========================================
- Hits        25074    22455    -2619     
- Misses       3249     4890    +1641     

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[lu-zero]

I'll fix wasi later.