multiboot.bin is a generated file

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

.gitignore

@@ -42,4 +42,5 @@ qemu-monitor.texi
 patches
 pc-bios/bios-pq/status
 pc-bios/vgabios-pq/status
+pc-bios/optionrom/multiboot.bin
 .stgit-*