Add comma in structured initialization in a few places

It just looks nicer…

src/journal-remote/journal-upload.c

@@ -413,7 +413,7 @@ static int setup_uploader(Uploader *u, const char *url, const char *state_file)
         assert(url);
 
         *u = (Uploader) {
-                .input = -1
+                .input = -1,
         };
 
         host = STARTSWITH_SET(url, "http://", "https://");

src/libsystemd/sd-bus/test-bus-error.c

@@ -15,7 +15,7 @@ static void test_error(void) {
         const sd_bus_error temporarily_const_error = {
                 .name = SD_BUS_ERROR_ACCESS_DENIED,
                 .message = "oh! no",
-                ._need_free = -1
+                ._need_free = -1,
         };
 
         assert_se(!sd_bus_error_is_set(&error));

src/update-utmp/update-utmp.c

@@ -215,7 +215,7 @@ static int on_runlevel(Context *c) {
 static int run(int argc, char *argv[]) {
         _cleanup_(context_clear) Context c = {
 #if HAVE_AUDIT
-                .audit_fd = -1
+                .audit_fd = -1,
 #endif
         };
         int r;