If we can't probe the architecture from QMP we parse the architecture
from the qemu binaries name. This results in the architecture being i386
instead of i686 which then results in QEMU_CAPS_PCI_MULTIBUS being unset
which gives a broken qemu command line.
This probably didn't show up earlier since most of the time there's also
a /usr/bin/qemu around which results in i686 capabilities.
/* For historical compat we use 'itanium' as arch name */
if (STREQ(tmp, "ia64"))
tmp = "itanium";
+ else if (STREQ(tmp, "i386"))
+ tmp = "i686";
} else {
uname_normalize(&ut);
tmp = ut.machine;