8061281: Microbenchmark suite build support, directory layout and sample benchmarks 8061282: Migrate jmh-jdk-microbenchmarks into the JDK Reviewed-by: ecaspole, mchung, erikj, ihse Contributed-by: magnus.ihse.bursie@oracle.com, erik.joelsson@oracle.com, claes.redestad@oracle.com, sfriberg@kth.se

/build/
/dist/
/.idea/
nbproject/private/
/webrev
/.src-rev
/.jib/
.DS_Store
.metadata/
.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
**/JTreport/**
**/JTwork/**