translations: convert .string files from Transifex to UTF-8

- Converts UTF-16 .string files downloaded from Transifex to UTF-8
  so they are not considered binary files for versioning.

Change-Id: I52b498efe96773046959e51cf11b4e560dc78ecc
Reviewed-by: Kateryna Kostiuk <kateryna.kostiuk@savoirfairelinux.com>

Ring/update-translations.sh

 #!/bin/bash
 
-tx push -s
+# don't fail on unknown byte sequences
+export LC_CTYPE=C
+
 tx pull -af --minimum-perc=1
+
+if [ "$(uname)" == "Darwin" ]; then
+    option="-I"
+else
+    option="-i"
+fi
+
+for file in `find . -name '*.strings'`; do
+    # Convert file if encoding is utf-16le
+    if [ `file $option $file | awk '{print $3;}'` = "charset=utf-16le" ]; then
+        echo "Converting $file..."
+        iconv -f UTF-16LE -t UTF-8 $file > $file.8
+        cp -f $file.8 $file
+        rm $file.8
+    fi
+done