kvm: external module: always generate config.kbuild
When implementing --with-kvm-trace, I supposed make would never enter
the 'kernel' directory when compiling with --with-patched-kernel. I was
wrong and broke --with-patched-kernel.
Change configure to always generate config.kbuild on the kernel
directory. Otherwise make will explode on 'make header-sync', that runs
even when --with-patched-kernel was used.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>