Before compiling page-vary-common.c, we have to make sure that
config-poison.h has been generated (which is in the "genh" list).

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/948


Message-Id: <20220330114808.942933-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>