fix (part of) memory leak on shutdown. See PR2975.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68457 91177308-0d34-0410-b5e6-96231b3b80d8

examples/HowToUseJIT/HowToUseJIT.cpp

@@ -42,6 +42,7 @@
 #include "llvm/ExecutionEngine/JIT.h"
 #include "llvm/ExecutionEngine/Interpreter.h"
 #include "llvm/ExecutionEngine/GenericValue.h"
+#include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
@@ -109,5 +110,8 @@ int main() {
 
   // Import result of execution:
   outs() << "Result: " << gv.IntVal << "\n";
+  EE->freeMachineCodeForFunction(FooF);
+  delete EE;
+  llvm_shutdown();
   return 0;
 }