Introduce a new tool_output_file class, which extends raw_ostream with

functionality that most command-line tools need: ensuring that the
output file gets deleted if the tool is interrupted or encounters an
error.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111595 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/FormattedStream.cpp

@@ -98,3 +98,6 @@ formatted_raw_ostream &llvm::fdbgs() {
   static formatted_raw_ostream S(dbgs());
   return S;
 }
+
+/// ~formatted_tool_output_file - Out-of-line destructor.
+formatted_tool_output_file::~formatted_tool_output_file() {}