Update JavaSieve example now that we're handling nested classes

Author: DougGregor

Samples/JavaSieve/Sources/JavaSieve/Java2Swift.config

@@ -20,6 +20,7 @@
     "com.gazman.quadratic_sieve.data.VectorWorkData" : "VectorWorkData",
     "com.gazman.quadratic_sieve.debug.Analytics" : "Analytics",
     "com.gazman.quadratic_sieve.debug.AssertUtils" : "AssertUtils",
+    "com.gazman.quadratic_sieve.debug.AssertUtils$Tester" : "AssertUtils.Tester",
     "com.gazman.quadratic_sieve.debug.Logger" : "Logger",
     "com.gazman.quadratic_sieve.fact.TrivialDivision" : "TrivialDivision",
     "com.gazman.quadratic_sieve.primes.BigPrimes" : "BigPrimes",