[xen staging-4.13] update Xen version to 4.13.4-pre

[patchbot@xxxxxxx]

commit e3bcd4db25f6dede60b6b7c1ba8479a4a1ba234b
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Apr 20 12:09:20 2021 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Apr 20 12:09:20 2021 +0200

    update Xen version to 4.13.4-pre
---
 xen/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/Makefile b/xen/Makefile
index 5dc4c51371..ef1d388efe 100644
--- a/xen/Makefile
+++ b/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    = 13
-export XEN_EXTRAVERSION ?= .3$(XEN_VENDORVERSION)
+export XEN_EXTRAVERSION ?= .4-pre$(XEN_VENDORVERSION)
 export XEN_FULLVERSION   = $(XEN_VERSION).$(XEN_SUBVERSION)$(XEN_EXTRAVERSION)
 -include xen-version
 
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generated by git-patchbot for /home/xen/git/xen.git#staging-4.13