init.sh: New function dx_ to execute path files

Generated by find, this is a wrapper in place of using
for loops everywhere. This simplification temporarily
increases the amount of code, because we don't do this
a lot, but this will reduce the growth of the build
system code size in future changes.

Signed-off-by: Leah Rowe <leah@libreboot.org>

include/lib.sh

@@ -160,12 +160,17 @@ find_ex()
 	xx="$1" && shift 1
 	$xmsg find "$@" 2>/dev/null | sort 1>"$fd" 2>/dev/null || \
 	    err "!find $(echo "$@") > \"$fd\""
-	while read -r fx; do
-		$xx "$fx" || break; :
-	done < "$fd"
+	dx_ "$xx" "$fd"
 	x_ rm -f "$fd"
 }
 
+dx_()
+{
+	[ -f "$2" ] && while read -r fx; do
+		$1 "$fx"
+	done < "$2"; :
+}
+
 x_()
 {
 	[ $# -lt 1 ] || [ -n "$1" ] || err "Empty first arg: x_ $(echo "$@")"