ipc: eventually use stat64 in ftok()
ipc: eventually use stat64 in ftok()

PR 4201
ftok() always used 32bit stat

Signed-off-by: Bernhard Reutner-Fischer <ce1ac9e9ad16abccd7821f371ad381197b4768ac@gmail.com>

joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc