nwztools: small fixes

Make sure scripts use bash, make nwz database generator more deterministic

Change-Id: I26812b697abe0406fb3c60d6eb231cb27edc81d5

utils/nwztools/database/nvp/parse_all_nvp_headers.sh

@@ -1,4 +1,4 @@
-#
+#!/bin/bash
 # usage: parse_all_nvp_headers /path/to/directory
 #
 # the expected structure is:

utils/nwztools/database/nvp/parse_all_nvp_nodes.sh

@@ -1,4 +1,4 @@
-#
+#!/bin/bash
 # usage: parse_all_nvp_nodes /path/to/directory
 #
 # the expected structure is:

utils/nwztools/database/nvp/parse_nvp_header.sh

@@ -1,3 +1,4 @@
+#!/bin/bash
 # usage
 # parse_header.sh /path/to/icx_nvp.h
 # parse_header.sh /path/to/linux/source [file]

utils/nwztools/database/nvp/parse_nvp_nodes.sh

@@ -1,3 +1,4 @@
+#!/bin/bash
 # usage
 # parse_nodes.sh /path/to/icx_nvp_emmc.ko output_file
 # parse_nodes.sh /path/to/rootfs/dir output_file