Spelling fixes in comments (it's -> its)

* it's -> its (fixed for all files)
* dont -> don't (only fixed in a line which was touched by the previous fix)
* distrub -> disturb (fixed in the same line)

Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/configure b/configure
index a5eb832..e19b6e3 100755
--- a/configure
+++ b/configure
@@ -232,7 +232,7 @@
 done
 # OS specific
 # Using uname is really, really broken.  Once we have the right set of checks
-# we can eliminate it's usage altogether
+# we can eliminate its usage altogether.
 
 cc="${CC-${cross_prefix}gcc}"
 ar="${AR-${cross_prefix}ar}"