meta-ieisystems: fp5280g3: timezone: The default time zone is UTC+8

This commit is to change the default time zone from UTC to UTC+8.

Tested:
~# timedatectl
               Local time: Sun 1970-01-04 06:51:27 CST
           Universal time: Sat 1970-01-03 22:51:27 UTC
                 RTC time: Sun 1970-01-04 06:51:28
                Time zone: Asia/Shanghai (CST, +0800)
System clock synchronized: no
              NTP service: active
          RTC in local TZ: no

Signed-off-by: George Liu <liuxiwei@ieisystem.com>
Change-Id: I40f28af879e60c0f8f1cdda9d9fb296076222462
diff --git a/meta-ieisystems/meta-fp5280g3/recipes-extended/timezone/tzdata.bbappend b/meta-ieisystems/meta-fp5280g3/recipes-extended/timezone/tzdata.bbappend
new file mode 100644
index 0000000..0bcd774
--- /dev/null
+++ b/meta-ieisystems/meta-fp5280g3/recipes-extended/timezone/tzdata.bbappend
@@ -0,0 +1 @@
+DEFAULT_TIMEZONE = "Asia/Shanghai"