update Xen version to 4.8.1

Config.mk

@@ -277,8 +277,8 @@ SEABIOS_UPSTREAM_URL ?= git://xenbits.xen.org/seabios.git
 MINIOS_UPSTREAM_URL ?= git://xenbits.xen.org/mini-os.git
 endif
 OVMF_UPSTREAM_REVISION ?= bc54e50e0fe03c570014f363b547426913e92449
-QEMU_UPSTREAM_REVISION ?= qemu-xen-4.8.0
-MINIOS_UPSTREAM_REVISION ?= xen-RELEASE-4.8.0
+QEMU_UPSTREAM_REVISION ?= qemu-xen-4.8.1
+MINIOS_UPSTREAM_REVISION ?= xen-RELEASE-4.8.1
 # Wed Sep 28 11:50:04 2016 +0200
 # minios: fix build issue with xen_*mb defines
 
@@ -289,9 +289,7 @@ SEABIOS_UPSTREAM_REVISION ?= rel-1.10.0
 ETHERBOOT_NICS ?= rtl8139 8086100e
 
 
-QEMU_TRADITIONAL_REVISION ?= 3bed93d7724564e15b1025723af81d2971bb0e4b
-# Thu Mar 9 11:14:55 2017 +0000
-# cirrus/vnc: zap drop bitblit support from console code.
+QEMU_TRADITIONAL_REVISION ?= xen-4.8.1
 
 # Specify which qemu-dm to use. This may be `ioemu' to use the old
 # Mercurial in-tree version, or a local directory, or a git URL.

xen/Makefile

@@ -2,7 +2,7 @@
 # All other places this is stored (eg. compile.h) should be autogenerated.
 export XEN_VERSION       = 4
 export XEN_SUBVERSION    = 8
-export XEN_EXTRAVERSION ?= .1-pre$(XEN_VENDORVERSION)
+export XEN_EXTRAVERSION ?= .1$(XEN_VENDORVERSION)
 export XEN_FULLVERSION   = $(XEN_VERSION).$(XEN_SUBVERSION)$(XEN_EXTRAVERSION)
 -include xen-version