ricty_generator.sh grave fix

--- ricty_generator.sh  2019-03-31 01:34:36.682166507 +0900
+++ ricty_generator_.sh 2019-03-31 01:30:58.392122815 +0900
@@ -685,6 +685,10 @@ while (i < SizeOf(fontstyle_list))
     Select(0u003c); Copy(); Select(0uff1c); Paste(); Move(250, 0); SetWidth(1000) # <
     Select(0u003e); Copy(); Select(0uff1e); Paste(); Move(250, 0); SetWidth(1000) # >

+    # \`  set base class
+    Print("Edit \` base class")
+    Select(0u0060); SetGlyphClass("base");
+
     # Edit en and em dashes
     Print("Edit en and em dashes")
     Select(0u2013); Copy()