C#: Add new tables to the dbscheme line span pragma.

Author: michaelnebel

csharp/ql/lib/semmlecode.csharp.dbscheme

@@ -385,16 +385,26 @@ directive_endregions(
 
 directive_lines(
   unique int id: @directive_line,
-  int kind: int ref); /* 0: default, 1: hidden, 2: numeric */
+  int kind: int ref); /* 0: default, 1: hidden, 2: numeric, 3: span */
 
 directive_line_value(
   unique int id: @directive_line ref,
   int line: int ref);
 
 directive_line_file(
   unique int id: @directive_line ref,
-  int file: @file ref
-)
+  int file: @file ref);
+
+directive_line_offset(
+  unique int id: @directive_line ref,
+  int offset: int ref);
+
+directive_line_span(
+  unique int id: @directive_line ref,
+  int startLine: int ref,
+  int startColumn: int ref,
+  int endLine: int ref,
+  int endColumn: int ref);
 
 directive_nullables(
   unique int id: @directive_nullable,