x86: Native Branch History Injection [XSA-456, CVE-2024-2201]
update to xen 4.17.4, remove patches now included upstream
rebase xen.gcc12.fixes.patch
x86 HVM hypercalls may trigger Xen bug check [XSA-454, CVE-2023-46842]
x86: Incorrect logic for BTC/SRSO mitigations [XSA-455, CVE-2024-31142]