Ruby: Add flow summaries for Array/Enumerable methods

Author: hvitved

ruby/ql/lib/codeql/ruby/frameworks/StandardLibrary.qll

@@ -0,0 +1,15 @@
+/**
+ * @kind path-problem
+ */
+
+import ruby
+import TestUtilities.InlineFlowTest
+import PathGraph
+
+class HasFlowTest extends InlineFlowTest {
+  override DataFlow::Configuration getTaintFlowConfig() { none() }
+}
+
+from DataFlow::PathNode source, DataFlow::PathNode sink, DefaultValueFlowConf conf
+where conf.hasFlowPath(source, sink)
+select sink, source, sink, "$@", source, source.toString()