Thread safety analysis: Make printSCFG compile again [NFC]

Not used productively, so no observable functional change.

Note that printSCFG doesn't yet work reliably, it seems to crash
sometimes.

llvm-svn: 342790
diff --git a/clang/lib/Analysis/ThreadSafetyCommon.cpp b/clang/lib/Analysis/ThreadSafetyCommon.cpp
index 3b6a264..115c012 100644
--- a/clang/lib/Analysis/ThreadSafetyCommon.cpp
+++ b/clang/lib/Analysis/ThreadSafetyCommon.cpp
@@ -944,6 +944,16 @@
 }
 
 /*
+namespace {
+
+class TILPrinter :
+    public til::PrettyPrinter<TILPrinter, llvm::raw_ostream> {};
+
+} // namespace
+
+namespace clang {
+namespace threadSafety {
+
 void printSCFG(CFGWalker &Walker) {
   llvm::BumpPtrAllocator Bpa;
   til::MemRegionRef Arena(&Bpa);
@@ -951,4 +961,7 @@
   til::SCFG *Scfg = SxBuilder.buildCFG(Walker);
   TILPrinter::print(Scfg, llvm::errs());
 }
+
+} // namespace threadSafety
+} // namespace clang
 */