build: fix race with creating qapi-generated Since qapi-generated/ is a global QEMU include path, we need to make sure it is created before anything is compiled, so do this in the configure phase rather than via the Makefile. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>