bench-boot: add -f option to only run fast boots

Comment out all tests that are known to be failing.

run: exit 1 on failure, was broken dude to termout pipe

run

@@ -263,7 +263,8 @@ else
     serial_monitor=
   fi
   if "$kvm"; then
-    extra_flags="${extra_flags} -enable-kvm"
+    extra_flags="${extra_flags}-enable-kvm \\
+"
   fi
   if "$kgdb"; then
     extra_flags_qemu="${extra_flags_qemu}-serial 'tcp::${common_gdb_port},server,nowait' \\
@@ -393,10 +394,9 @@ if [ -n "${1:-}" ]; then
 "
 fi
 cmd="time \\
-${cmd}"
+${cmd}${extra_flags}"
 if [ -z "$debug_vm" ]; then
   cmd="${cmd}\
-${extra_flags}\
 |& tee >(ts -s %.s > ${common_termout_file})\
 "
 fi