Fix spelling in comment.

The company which made Virtual PC was Connectix.
They use the magic string "conectix" in their disk images.
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

block/vpc.c

 /*
- * Block driver for Conectix/Microsoft Virtual PC images
+ * Block driver for Connectix / Microsoft Virtual PC images
  *
  * Copyright (c) 2005 Alex Beregszaszi
  * Copyright (c) 2009 Kevin Wolf <kwolf@suse.de>