Go: Adjust to use the qlpack data-flow api.

Author: aschackmull

go/ql/lib/qlpack.yml

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

go/ql/lib/semmle/go/dataflow/DataFlow.qll

@@ -22,7 +22,9 @@ import go
  * data flow analysis.
  */
 module DataFlow {
-  import semmle.go.dataflow.internal.DataFlow
+  private import semmle.go.dataflow.internal.DataFlowImplSpecific
+  private import codeql.dataflow.DataFlow
+  import DataFlowMake<GoDataFlow>
   import semmle.go.dataflow.internal.DataFlowImpl1
   import Properties
 }