Document freetype 2 vulnability.


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@374189 35697150-7ecd-e111-bb59-0022644237b5
Update freetype2 to 2.5.4.

MFH:		2014Q4
Security:	567beb1e-7e0a-11e4-b9cc-bcaec565249c


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@374190 35697150-7ecd-e111-bb59-0022644237b5