Driver: Release Host, ToolChain, and Tool implementations.

llvm-svn: 67146
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 5f29195..f63fc63 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -48,6 +48,7 @@
 
 Driver::~Driver() {
   delete Opts;
+  delete Host;
 }
 
 ArgList *Driver::ParseArgStrings(const char **ArgBegin, const char **ArgEnd) {