Deallocate type units when destroying a DWARFContext.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191637 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/DebugInfo/DWARFContext.cpp b/lib/DebugInfo/DWARFContext.cpp
index f8234e9..df4633d 100644
--- a/lib/DebugInfo/DWARFContext.cpp
+++ b/lib/DebugInfo/DWARFContext.cpp
@@ -25,6 +25,7 @@
 
 DWARFContext::~DWARFContext() {
   DeleteContainerPointers(CUs);
+  DeleteContainerPointers(TUs);
   DeleteContainerPointers(DWOCUs);
 }