New unit test for XOR-2G authentication

Let's test if the XOR-2G algorithm does what it's supposed to do.

Change-Id: I7014258751624ff18c51912b6348c3cd876bb23f
diff --git a/tests/testsuite.at b/tests/testsuite.at
index 6b2e75f..e447cdc 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -126,6 +126,12 @@
 AT_CHECK([$abs_top_builddir/tests/auth/milenage_test], [0], [expout], [ignore])
 AT_CLEANUP
 
+AT_SETUP([auth_xor2g])
+AT_KEYWORDS([auth_xor2g])
+cat $abs_srcdir/auth/xor2g_test.ok > expout
+AT_CHECK([$abs_top_builddir/tests/auth/xor2g_test], [0], [expout], [ignore])
+AT_CLEANUP
+
 AT_SETUP([comp128])
 AT_KEYWORDS([comp128])
 cat $abs_srcdir/comp128/comp128_test.ok > expout