[qemu-xen master] Update version for v5.1.0-rc1 release

[patchbot@xxxxxxx]

commit c8004fe6bbfc0d9c2e7b942c418a85efb3ac4b00
Author:     Peter Maydell <peter.maydell@xxxxxxxxxx>
AuthorDate: Tue Jul 21 20:28:59 2020 +0100
Commit:     Peter Maydell <peter.maydell@xxxxxxxxxx>
CommitDate: Tue Jul 21 20:28:59 2020 +0100

    Update version for v5.1.0-rc1 release
    
    Signed-off-by: Peter Maydell <peter.maydell@xxxxxxxxxx>
---
 VERSION | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/VERSION b/VERSION
index e427b98203..023d5c9cfb 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.0.90
+5.0.91
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#master