ecore: replace arbitrary time with 32-bit safe arbitrary time

The end of time is much closer than you think.  it_value.tv_sec is
a signed 32-bit number on 32-bit machines. Using a negative tv_sec
causes timerfd_settime() to fail.

src/lib/ecore/ecore_main.c

@@ -952,7 +952,7 @@ detect_time_changes_start(void)
    if (realtime_fd < 0) return;
 
    memset(&its, 0, sizeof(its));
-   its.it_value.tv_sec += 0xfffffff0; // end of time - 0xf
+   its.it_value.tv_sec = 0x7ffffff0; // end of time - 0xf
    if (timerfd_settime(realtime_fd,
                        TFD_TIMER_ABSTIME | TFD_TIMER_CANCELON_SET,
                        &its, NULL) < 0)