[chapel-lang/chapel] Test performance of upgrading to llvm 10

Branch: refs/heads/master
Revision: 1201483
Author: ronawho
Log Message:

Merge pull request #16288 from ronawho/perf-test-llvm-10

Test performance of upgrading to llvm 10

Modified Files:
M util/cron/test-perf.chapcs.playground.bash

Compare: https://github.com/chapel-lang/chapel/compare/8ab81270ba9a...12014833667b