Bug 1014659 - Copy cppunit zip during package-tests

I'm currently working on running the cppunit tests from their own test package [1]. The naming convention I'm using for the package is *.tests.cppunit.zip which doesn't get picked up by the copy statement in package-tests. Changing *.tests.zip to *.tests*zip fixes this and will cover any future separate test packages following the same naming convention.

[1] https://bugzilla.mozilla.org/show_bug.cgi?id=1014659