ip utils test: revive the test

Tested: unit test passed.

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: I6ec2036c09eb73c2ff34779ed055dff7769c2f57
diff --git a/meson.build b/meson.build
index 2ba0fc2..1ed9bfd 100644
--- a/meson.build
+++ b/meson.build
@@ -393,6 +393,7 @@
   'redfish-core/lib/ut/service_root_test.cpp',
   'redfish-core/ut/configfile_test.cpp',
   'redfish-core/ut/hex_utils_test.cpp',
+  'redfish-core/ut/ip_utils_test.cpp',
   'redfish-core/ut/json_utils_test.cpp',
   'redfish-core/ut/lock_test.cpp',
   'redfish-core/ut/privileges_test.cpp',