PS: Add taint-tracking files.

Author: MathiasVP

powershell/ql/lib/semmle/code/powershell/dataflow/TaintTracking.qll

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+/**
+ * Provides classes for performing local (intra-procedural) and
+ * global (inter-procedural) taint-tracking analyses.
+ */
+module TaintTracking {
+  import semmle.code.powershell.dataflow.internal.TaintTrackingImpl::Public
+  private import semmle.code.powershell.dataflow.internal.DataFlowImplSpecific
+  private import semmle.code.powershell.dataflow.internal.TaintTrackingImplSpecific
+  private import codeql.dataflow.TaintTracking
+  private import powershell
+  import TaintFlowMake<Location, PowershellDataFlow, PowershellTaintTracking>
+}

powershell/ql/lib/semmle/code/powershell/dataflow/internal/TaintTrackingImpl.qll

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+import semmle.code.powershell.dataflow.internal.TaintTrackingPublic as Public
+
+module Private {
+  import semmle.code.powershell.dataflow.DataFlow::DataFlow as DataFlow
+  import semmle.code.powershell.dataflow.internal.DataFlowImpl as DataFlowInternal
+  import semmle.code.powershell.dataflow.internal.TaintTrackingPrivate
+}