test: Fix missing comma in app_ut.c

Caught by clang 12.

Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Change-Id: Ibed23c3aab80508aebf06e4ba44e14e385a3256b
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/8854
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Community-CI: Mellanox Build Bot

test/unit/lib/event/app.c/app_ut.c

@@ -121,7 +121,7 @@ test_spdk_app_parse_args(void)
 							"-d",
 							"-p",
 							"--single-file-segments",
-							"--silence-noticelog"
+							"--silence-noticelog",
 							"-R"
 						       };