filelist2content: Accept backslash in filenames

Use `read -r` to avoid interpreting backslash when reading the file
list.

src/filelist2content.sh.in

@@ -64,7 +64,7 @@ function do_f2c() {
         exit 1
     fi
 
-    while read filename ; do
+    while read -r filename ; do
         data=$(stat --format "$(get_format_string)" "${root}${filename}")
 
         if [ "$?" -gt 0 ] ; then