[xen staging] xen/Makefile: Correct XEN_EXTERVERSION for unstable

[patchbot@xxxxxxx]

commit e5182b40cf4bbb89292d66b8f3047a9ee913a90a
Author:     Julien Grall <jgrall@xxxxxxxxxx>
AuthorDate: Fri Jul 19 12:34:24 2024 +0100
Commit:     Julien Grall <jgrall@xxxxxxxxxx>
CommitDate: Fri Jul 19 12:34:32 2024 +0100

    xen/Makefile: Correct XEN_EXTERVERSION for unstable
    
    Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
---
 xen/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/Makefile b/xen/Makefile
index ca0ead3f23..2e1a925c84 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -6,7 +6,7 @@ this-makefile := $(call lastword,$(MAKEFILE_LIST))
 # All other places this is stored (eg. compile.h) should be autogenerated.
 export XEN_VERSION       = 4
 export XEN_SUBVERSION    = 20
-export XEN_EXTRAVERSION ?= $(XEN_VENDORVERSION)
+export XEN_EXTRAVERSION ?= -unstable$(XEN_VENDORVERSION)
 export XEN_FULLVERSION   = $(XEN_VERSION).$(XEN_SUBVERSION)$(XEN_EXTRAVERSION)
 -include xen-version
 
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