Replace genisoimage with xorriso

xorriso is an alternative to genisoimage with the vivid upstream
(the upstream of genisoimage/cdrkit is inactive for a long time).

ipxe.spec

@@ -53,7 +53,7 @@
 
 Name:    ipxe
 Version: %{date}
-Release: 3.git%{hash}%{?dist}
+Release: 4.git%{hash}%{?dist}
 Summary: A network boot loader
 
 License: GPLv2 with additional permissions and BSD
@@ -75,7 +75,7 @@ BuildRequires: perl-lib
 %endif
 BuildRequires: syslinux
 BuildRequires: mtools
-BuildRequires: genisoimage
+BuildRequires: xorriso
 BuildRequires: edk2-tools
 BuildRequires: xz-devel
 BuildRequires: gcc
@@ -246,6 +246,9 @@ done
 %endif
 
 %changelog
+* Mon Jun 14 2021 Jiri Kucera <jkucera@redhat.com> - 20200823-4.git4bd064de
+- Replace genisoimage by xorriso
+
 * Tue Feb 23 2021 Cole Robinson <aintdiscole@gmail.com> - 20200823-3.git4bd064de
 - combine BIOS and EFI roms using "util/catrom.pl"