8004330: Add missing Unsafe entry points for addAndGet() family
Summary: Add Unsafe addAndGet() methods which have intrinsics in Hotspot (7023898)
Reviewed-by: alanb, kvn
^build/
^dist/
/nbproject/private/
^src/share/tools/hsdis/build/
^src/share/tools/IdealGraphVisualizer/[a-zA-Z0-9]*/build/
^src/share/tools/IdealGraphVisualizer/build/
^src/share/tools/IdealGraphVisualizer/dist/
^.hgtip
.DS_Store