Update ChangeLog in preparation for the 7.26 release.

tools/README.txt

@@ -690,7 +690,11 @@ kconfig.bat
 logparser.c
 -----------
 
-  Convert a git log to ChangeLog format.
+  Convert a git log to ChangeLog format.  Recommended usage:
+
+    git log --date-order --reverse <rev1>..<rev2>|HEAD >_git_log.tmp
+    logparser _git_log.tmp >_changelog.txt
+    rm -f _git_log.tmp
 
 mkimage.sh
 ----------

tools/configure.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-# configure.sh
+# tools/configure.sh
 #
 #   Copyright (C) 2007, 2008, 2011, 2015, 2017-2018 Gregory Nutt. All rights
 #     reserved.