ktest: Fix some typos in config-bisect.pl

This patch fixes some spelling typos in config-bisect.pl

Link: http://lkml.kernel.org/r/20190723032445.14220-1-standby24x7@gmail.comAcked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

tools/testing/ktest/config-bisect.pl

@@ -663,7 +663,7 @@ while ($#ARGV >= 0) {
     }
 
     else {
-	die "Unknow option $opt\n";
+	die "Unknown option $opt\n";
     }
 }
 
@@ -732,7 +732,7 @@ if ($start) {
 	}
     }
     run_command "cp $good_start $good" or die "failed to copy to $good\n";
-    run_command "cp $bad_start $bad" or die "faield to copy to $bad\n";
+    run_command "cp $bad_start $bad" or die "failed to copy to $bad\n";
 } else {
     if ( ! -f $good ) {
 	die "Can not find file $good\n";