check: Check that /proc/PID/timers file is here

It's required to get support for posix cpu timers and
it has appeared in v3.10
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-check.c

@@ -517,6 +517,18 @@ static int check_mem_dirty_track(void)
 	return 0;
 }
 
+static int check_posix_timers(void)
+{
+	int ret;
+
+	ret = access("/proc/self/timers", R_OK);
+	if (!ret)
+		return 0;
+
+	pr_msg("/proc/<pid>/timers file is missing.\n");
+	return -1;
+}
+
 int cr_check(void)
 {
 	int ret = 0;
@@ -545,6 +557,7 @@ int cr_check(void)
 	ret |= check_sigqueuinfo();
 	ret |= check_ptrace_peeksiginfo();
 	ret |= check_mem_dirty_track();
+	ret |= check_posix_timers();
 
 	if (!ret)
 		pr_msg("Looks good.\n");