Remove another leak. Due to some reason AliasSetTracker didn't had any dtor...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44320 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/LICM.cpp

@@ -84,6 +84,11 @@ namespace {
     }
 
     bool doFinalization() {
+      // Free the values stored in the map
+      for (std::map<Loop *, AliasSetTracker *>::iterator
+             I = LoopToAliasMap.begin(), E = LoopToAliasMap.end(); I != E; ++I)
+        delete I->second;
+
       LoopToAliasMap.clear();
       return false;
     }