kexec-tools: Add patch for kernel since 4.20.0

Add patch:

    From: Donald Buczek <buczek@molgen.mpg.de>
    Date: Fri, 30 Aug 2019 10:52:58 +0200
    Subject: [PATCH] x86: Fix PAGE_OFFSET for kernels since 4.20
    To: horms@verge.net.au,  kexec@lists.infradead.org,
      Bhupesh Sharma <bhsharma@redhat.com>, buczek@molgen.mpg.de

    Linux kernel commit d52888aa2753 ("x86/mm: Move LDT remap out of KASLR
    region on 5-level paging") changed the base of the direct mapping
    from 0xffff880000000000 to 0xffff888000000000. This was merged
    into v4.20-rc2.

    Update to new address accordingly.

kexec-tools.be0

@@ -15,7 +15,7 @@ SRCURL[0]="https://www.kernel.org/pub/linux/utils/kernel/kexec/kexec-tools-${PKG
 ## Add URLs/pathes to patch files to the PATCHURL array.
 ## The sources will be patched in the order of the array.
 
-# PATCHURL+=()
+PATCHURL+=(/src/mariux/patches/kexec-tools-x86-Fix-PAGE_OFFSET-for-kernels-since-4.20.patch)
 
 ###############################################################################
 ## Add filename patterns to the EXCLUDE array of files that should not