scst/include/backport.h: fix iscsi_scst build probem on rhel7.4 #132
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rhel7.4 kernel: 3.10.0-693.el7.x86_64 , do not have kobj_ns_grab_current & kobj_ns_drop defined
building process without error, but when insert to kernel failed:
[ 457.326962] iscsi_scst: Unknown symbol kobj_ns_grab_current (err 0)
[ 457.326971] iscsi_scst: Unknown symbol kobj_ns_drop (err 0)
so trying to change RHEL_MAJOR -0 <8 ,
rebuid->modprobe,works fine.