Auto merge of #1083 - danielverkamp:fallocate64, r=alexcrichton
Auto merge of #1083 - danielverkamp:fallocate64, r=alexcrichton

Add fallocate64 and posix_fallocate64 bindings

These are necessary for large file support on 32-bit platforms,
following the same pattern as 74825222cf8f ("Add bindings for
-D_FILE_OFFSET_BITS=64").

Signed-off-by: Daniel Verkamp <72bc170b46ec491f7bdd4359a1c0bfed274de40c@chromium.org>

rust-lang/libc,rust-lang/libc,rust-lang/libc,rust-lang-nursery/libc,rust-lang-nursery/libc,rust-lang-nursery/libc