xen/arch/x86: make objdump output user locale agnostic

xen/arch/x86: make objdump output user locale agnostic

The objdump output is fed to grep, so make sure it doesn't change with
different user locales and break the grep parsing.
This problem was identified while updating xen in Debian and the fix is
needed for generating reproducible builds in varying environments.

Signed-off-by: Maximilian Engelhardt <maxi@daemonizer.de>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
master commit: 0d729221ab74c5d2571e71501dc63838acbf752a
master date: 2024-12-30 21:40:37 +0000