Use (void) to silenc coverity on proc title changes

This is a cosmetic best-effort thing anyway.

src/basic/process-util.c

@@ -205,7 +205,7 @@ void rename_process(const char name[8]) {
          * "systemd"). If you pass a longer string it will be
          * truncated */
 
-        prctl(PR_SET_NAME, name);
+        (void) prctl(PR_SET_NAME, name);
 
         if (program_invocation_name)
                 strncpy(program_invocation_name, name, strlen(program_invocation_name));

src/libsystemd/sd-resolve/sd-resolve.c

@@ -403,7 +403,7 @@ static void* thread_worker(void *p) {
         assert_se(pthread_sigmask(SIG_BLOCK, &fullset, NULL) == 0);
 
         /* Assign a pretty name to this thread */
-        prctl(PR_SET_NAME, (unsigned long) "sd-resolve");
+        (void) prctl(PR_SET_NAME, (unsigned long) "sd-resolve");
 
         while (!resolve->dead) {
                 union {