Do not rely on bashisms and behaviour undefined by the POSIX specification. Part 2

Signed-off-by: Ferass 'Vitali64' EL HAFIDI <vitali64pmemail@protonmail.com>

resources/scripts/blobs/download

@@ -1,6 +1,7 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
+# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 # SPDX-License-Identifier: GPL-3.0-only
 
 board="${1}"
@@ -16,10 +17,10 @@ Download_needed(){
 	for need in ${needs}; do
 		case ${need} in
 			*ME*)
-				Extract_me || _failed+=" me"
+				Extract_me || _failed="${_failed} me"
 				;;
 			*MRC*)
-				./download mrc || _failed+=" mrc"
+				./download mrc || _failed="${_failed} mrc"
 				;;
 	esac
 	done
@@ -96,23 +97,23 @@ set -- "resources/coreboot/${board}/config/*"
 
 if [ "${CONFIG_HAVE_MRC}" = "y" ]; then
 	printf 'haswell board detected, downloading mrc\n'
-	needs+=" MRC"
+	needs="${needs} MRC"
 
 fi
 
 if [ "${CONFIG_HAVE_IFD_BIN}" = "y" ]; then
 	printf 'board needs intel firmware descriptor\n'
-	needs+=" IFD"
+	needs="${needs} IFD"
 fi
 
 if [ "${CONFIG_HAVE_ME_BIN}" = "y" ]; then
 	printf 'board needs intel management engine\n'
-	needs+=" ME"
+	needs="${needs} ME"
 fi
 
 if [ "${CONFIG_HAVE_GBE_BIN}" = "y" ]; then
 	printf 'board needs gigabit ethernet firmware\n'
-	needs+=" GBE"
+	needs="${needs} GBE"
 fi
 
 # Quickly exit without wasting more time if there are no blobs needed (GM45)
@@ -138,8 +139,7 @@ while read -r line ; do
 		me_dl_bkup=${2}
 		;;
 	esac
-done <<< $(eval "awk ' /\{.*${board_short}.*}{/ {flag=1;next} /\}/{flag=0} flag { print }' resources/blobs/sources")
-
+done << EOF
+$(eval "awk ' /\{.*${board_short}.*}{/ {flag=1;next} /\}/{flag=0} flag { print }' resources/blobs/sources")
+EOF
 Download_needed
-
-