8231209: [REDO] ThreadMXBean::getThreadAllocatedBytes() can be quicker for self thread Summary: Add com.sun.management.getCurrentThreadAllocatedBytes, implement getThreadAllocatedBytes(long) independent of getThreadAllocatedBytes(long[]) Reviewed-by: mchung, dholmes, sspitsyn

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