C/C++: Adjust to use the qlpack data-flow api.

Author: aschackmull

cpp/ql/lib/qlpack.yml

@@ -6,6 +6,7 @@ extractor: cpp
 library: true
 upgrades: upgrades
 dependencies:
+  codeql/dataflow: ${workspace}
   codeql/ssa: ${workspace}
   codeql/tutorial: ${workspace}
   codeql/util: ${workspace}

cpp/ql/lib/semmle/code/cpp/dataflow/DataFlow.qll

@@ -26,6 +26,8 @@ import cpp
  * global (inter-procedural) data flow analyses.
  */
 deprecated module DataFlow {
-  import semmle.code.cpp.dataflow.internal.DataFlow
+  private import semmle.code.cpp.dataflow.internal.DataFlowImplSpecific
+  private import codeql.dataflow.DataFlow
+  import DataFlowMake<CppOldDataFlow>
   import semmle.code.cpp.dataflow.internal.DataFlowImpl1
 }