Add HAVE_OFF64_T to AndroidConfig.h

For platforms that have _FILE_OFFSET_BITS=32 and need to access large
files, we need some way to access 64-bit file APIs. This adds a hint to
allow programs to choose alternate APIs if possible.

Change-Id: Ifdc204df269350a22f52c0e4221e9d7d3b7a57fe
8 files changed