[PM] Update the examples to reflect the removal of the
llvm/PassManager.h wrapper header and its using declarations. These now
directly use the legacy namespace.

I had updated the #include lines in my large commit but forgot that the
examples weren't being built and didn't update the code to use the
correct namespace. Sorry for the noise here.

llvm-svn: 229095
diff --git a/llvm/examples/Kaleidoscope/Chapter7/toy.cpp b/llvm/examples/Kaleidoscope/Chapter7/toy.cpp
index 07b53ad..82f083a 100644
--- a/llvm/examples/Kaleidoscope/Chapter7/toy.cpp
+++ b/llvm/examples/Kaleidoscope/Chapter7/toy.cpp
@@ -665,7 +665,7 @@
 static Module *TheModule;
 static IRBuilder<> Builder(getGlobalContext());
 static std::map<std::string, AllocaInst *> NamedValues;
-static FunctionPassManager *TheFPM;
+static legacy::FunctionPassManager *TheFPM;
 
 Value *ErrorV(const char *Str) {
   Error(Str);
@@ -1203,7 +1203,7 @@
     exit(1);
   }
 
-  FunctionPassManager OurFPM(TheModule);
+  legacy::FunctionPassManager OurFPM(TheModule);
 
   // Set up the optimizer pipeline.  Start with registering info about how the
   // target lays out data structures.