README:cjson/sqlite download for linux

[luoliwoshang]

The use of cjson and sqlite in llgo will be tested in this PR

• Ubuntu
  Test image：
  https://github.com/luoliwoshang/DockerFiles/blob/main/ubuntu/normal/Dockerfile

  • cjson
  • sqlite

• Debian
  Test image:
  https://github.com/luoliwoshang/DockerFiles/blob/c2b6fc3f01dca6aa71c0f50c80840aaae22b5a67/debian/normal/Dockerfile#L1-L36

  • cjson
  • sqlite

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.02%. Comparing base (d48b12a) to head (a2703ce).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #322   +/-   ##
=======================================
  Coverage   97.02%   97.02%           
=======================================
  Files          18       18           
  Lines        3761     3761           
=======================================
  Hits         3649     3649           
  Misses         95       95           
  Partials       17       17           

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