linux: add aarch64_ilp32 support.
linux: add aarch64_ilp32 support.

This patch adds aarch64 (arm64) ILP32 support by using
the proper syscalls for sys_fcntl(), sys_fstat(), sys_lseek()
and sys_mmap().

Signed-off-by: Christoph Müllner <a5d225a1160170157d2efb6ceb19cc9ac620c91b@gmail.com>

gperftools/gperftools,gperftools/gperftools,acmorrow/gperftools,romange/gperftools,romange/gperftools,romange/gperftools,romange/gperftools,acmorrow/gperftools,alk/gperftools,alk/gperftools,acmorrow/gperftools,acmorrow/gperftools,alk/gperftools,alk/gperftools,gperftools/gperftools,gperftools/gperftools