Testrunner: Added an option to set # dex2oat-jobs for each test

--dex2oat-jobs

Test: test/testrunner/testrunner.py -j64 --dex2oat-jobs 15
Test: test/testrunner/testrunner.py -j64
Bug: 64686163
Change-Id: I2e41605b35392cbfb4e85d472cb901a766a3081e
2 files changed