Fix mips64 struct stat64

Cherry pick bionic 86d2feef9f4df517dd5755b39b993bec0c3e1ea5 which
fixes struct stat64.  This may look like breaking mips64 ABI, but mips64
support is stil work in progress post-L

Also see prebuilts/ndk e6639a4c0ba9296a19fd477154aace3585221d9d

Change-Id: Ia8859762191220b9d3127b37970f05594375ca40
1 file changed