Ruby: add downgrade scripts

Author: aibaars

ruby/downgrades/24d81950f3ab7e67e14553e1a5111a04e8ae8445/block_argument_def.ql

@@ -0,0 +1,13 @@
+class AstNode extends @ruby_ast_node {
+  string toString() { none() }
+}
+
+class Location extends @location {
+  string toString() { none() }
+}
+
+from AstNode ruby_block_argument, AstNode child, Location location
+where
+  ruby_block_argument_def(ruby_block_argument, location) and
+  ruby_block_argument_child(ruby_block_argument, child)
+select ruby_block_argument, child, location

ruby/downgrades/24d81950f3ab7e67e14553e1a5111a04e8ae8445/block_parameter_def.ql

@@ -0,0 +1,13 @@
+class AstNode extends @ruby_ast_node {
+  string toString() { none() }
+}
+
+class Location extends @location {
+  string toString() { none() }
+}
+
+from AstNode ruby_block_parameter, AstNode name, Location location
+where
+  ruby_block_parameter_def(ruby_block_parameter, location) and
+  ruby_block_parameter_name(ruby_block_parameter, name)
+select ruby_block_parameter, name, location