Cleanup tools scripts

* whitespace and comment cleanups only

Change-Id: I4e631e9a9b8151758dc8c96b3aef76b963d5ea7e
diff --git a/tools/build_usb_boot.sh b/tools/build_usb_boot.sh
index cca2a68..f64b7b6 100755
--- a/tools/build_usb_boot.sh
+++ b/tools/build_usb_boot.sh
@@ -1,5 +1,8 @@
 #!/bin/bash -e
-# build_usb_boot.sh - Create a syslinux boot environment
+
+# **build_usb_boot.sh**
+
+# Create a syslinux boot environment
 #
 # build_usb_boot.sh destdev
 #