main: print build timings even if no previous build succeeded

[jiegec]

If the first package failed to build, the build timings summary is not shown. This pull requests change the code to always show the summary.

[what-the-diff]

PR Summary

• Simplified Code Structure

  This update removes an extra verification step in our system. Previously, the code would check whether 'build_timings' was present before calling the 'print_build_timings' function. With this change, our system is streamlined, eliminating unnecessary checks, and hence, this could potentially improve our system's overall performance.

[jiegec]

If we want to guard against null instead of [], we may want to use a stricter check.