posix: Copy gfid from stat to dirent for readdirp
posix: Copy gfid from stat to dirent for readdirp

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 971 (dynamic volume management)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=971

Kaushikbv/Gluster,Kaushikbv/Gluster,Kaushikbv/Gluster