Add patch "kernel/exit.c: export abort() to modules" to 4.14-stable tree

[Evgeniy Didin]

Patch subject:	"kernel/exit.c: export abort() to modules"
Commit ID:	dc8635b78cd8
Reason: 	While building mpi.ko module with lastest stable Linux 
		v4.14.17 an error occured:
		>ERROR: "abort" [lib/mpi/mpi.ko] undefined!
Kernel version:	4.14.x