libgfapi : Fix for hardlink creation on SMB mount

Previously the inode of the hard link was left uninitialised hence
glfs_loc_link() used to fail with invalid parameter.Since inode is
same for both the files in hard link creation,   updated the inode
field of hard link to be same as that of the original file.

Change-Id: Ifd6439867d982524a7b48bf3f6add6e844b3c4c1
BUG: 996063
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/5882
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>