HOWTO: add Chinese translation of Documentation/HOWTO

This is a Chinese translated version of Documentation/HOWTO.  Currently
Chinese involvement in Linux kernel is very low, especially comparing to
its largest population base.  Language could be the main obstacle.  Hope
this document will help more Chinese to contribute to Linux kernel.
Signed-off-by: NLi Yang <leoli@freescale.com>
Signed-off-by: NTripleX Chung <xxx.phy@gmail.com>
Signed-off-by: NMaggie Chen <chenqi@beyondsoft.com>
Signed-off-by: NWANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>