Add multiple security patches from IcedTea6 1.12.3.

http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2013-February/021858.html
http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2013-February/021998.html

Obtained from:	IcedTea Project
Merge pull request #38 from reallyenglish/mitsuruy

Add multiple security patches from IcedTea6 1.12.3.