rpm: disable LTO in Fedora 34
rpm: disable LTO in Fedora 34

A binutils change has caused breakage when linking the tests

/usr/bin/ld: tests/libtest_qemu_driver.so: undefined reference to `__open_missing_mode'

This is probably a regression in binutils, so disable LTO until we get
more clarity on the root cause and whether binutils or libvirt will need
changing.

  https://bugzilla.redhat.com/show_bug.cgi?id=1889763

Signed-off-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

nertpinx/libvirt,olafhering/libvirt,olafhering/libvirt,crobinso/libvirt,nertpinx/libvirt,jardasgit/libvirt,libvirt/libvirt,olafhering/libvirt,zippy2/libvirt,zippy2/libvirt,zippy2/libvirt,jfehlig/libvirt,jfehlig/libvirt,libvirt/libvirt,nertpinx/libvirt,jardasgit/libvirt,crobinso/libvirt,jfehlig/libvirt,crobinso/libvirt,jfehlig/libvirt,zippy2/libvirt,libvirt/libvirt,jardasgit/libvirt,nertpinx/libvirt,jardasgit/libvirt,olafhering/libvirt,libvirt/libvirt,jardasgit/libvirt,crobinso/libvirt,nertpinx/libvirt