Add Japanese translations of qet_directory

elements/20_logic/10_functions/qet_directory

@@ -14,5 +14,6 @@
         <name lang="nl">Functie Plan (FUP)</name>
         <name lang="be">Logische poorten</name>
         <name lang="da">Logik funktioner</name>
+        <name lang="ja">論理ゲート</name>
     </names>
 </qet-directory>

elements/20_logic/20_grafcet/qet_directory

@@ -12,5 +12,6 @@
         <name lang="nl">Grafcet afloopdiagram</name>
         <name lang="be">Functie diagram (Grafcet)</name>
         <name lang="da">Sekvens</name>
+        <name lang="ja">Grafcet</name>
     </names>
 </qet-directory>

elements/20_logic/30_ladder/qet_directory

@@ -14,5 +14,6 @@
         <name lang="nl">Ladder Diagram (KOP)</name>
         <name lang="be">Ladder (KOP)</name>
         <name lang="da">Ladder</name>
+        <name lang="ja">ラダー</name>
     </names>
 </qet-directory>

elements/20_logic/40_flowchart/qet_directory

@@ -11,5 +11,6 @@
         <name lang="nl">Stroomschema</name>
         <name lang="be">Organisatieschema</name>
         <name lang="da">Rutediagram</name>
+        <name lang="ja">フローチャート</name>
     </names>
 </qet-directory>

elements/20_logic/qet_directory

@@ -11,5 +11,6 @@
         <name lang="nl">Logica</name>
         <name lang="ru">Логика</name>
         <name lang="da">Logik</name>
+        <name lang="ja">論理</name>
     </names>
 </qet-directory>