linux: pread/pwrite: fix 64bit handling
linux: pread/pwrite: fix 64bit handling

This is a fix similar to 458076d59ef9849f79d27e21b6094b0b3a85fbb4.
But master has been rewritten heavily, so do a minor backport.

Signed-off-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@gentoo.org>

ndmsystems/uClibc,ndmsystems/uClibc,ndmsystems/uClibc,ndmsystems/uClibc