FreeBSD/ports 0cf5fe5 (r459787)emulators/xen-kernel Makefile

xen-kernel: fix build with clang 6 and apply pending XSA patches

This includes a band-aid for running 64bit PV guests without
compromising the whole system.

Commit the makefile diff left behind in r459786.

MFH:            2018Q1
Sponsored by:   Citrix Systems R&D
DeltaFile
+12-2emulators/xen-kernel/Makefile
+12-21 files

UnifiedSplitRaw