8219149: ProcessTools.ProcessBuilder should print timing info for subprocesses
Summary: Add some timestamped logging messages to OutputBuffer.
Reviewed-by: rriggs, dcubed, lmesnik, dholmes
/build/
/dist/
/.idea/
nbproject/private/
/webrev
/.src-rev
/.jib/
.DS_Store
.metadata/
.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
**/JTreport/**
**/JTwork/**