linux(4): Export the AT_EXECFN depending on the process osreldata

[dchagin]

Summary

AT_EXECFN has appeared in the 2.6.26 Linux kernel first time.

[emaste]

I wonder if it makes sense to just inline the LINUX_KERNVER for these kinds of tests?

if ((p->p_osrel >= LINUX_KERNVER(2,6,26) || p->p_osrel == 0) &&
    imgp->execpathp != 0)

[dchagin]

In D39647#902355, @emaste wrote:

I wonder if it makes sense to just inline the LINUX_KERNVER for these kinds of tests?

if ((p->p_osrel >= LINUX_KERNVER(2,6,26) || p->p_osrel == 0) &&
    imgp->execpathp != 0)

well, I like it, however we already uses such namings and I try to to be consistent, I can change naming by separate commit for all LINUX_KERNVER_XXXX