java/visualvm: update to 1.3.8

PR:		194229
Submitted by:	Jean-Francois BOEUF <JeanFrancois.Boeuf@Gmail.com>


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@370496 35697150-7ecd-e111-bb59-0022644237b5