Change raw_fd_ostream to take flags as an optional bitmask 
instead of as two bools.  Use this to add a F_Append flag
which has the obvious behavior.

Other unrelated changes conflated into this patch:

1. REmove EH stuff from llvm-dis and llvm-as, the try blocks
   are dead.
2. Simplify the filename inference code in llvm-as/llvm-dis,
   because raw_fd_ostream does the right thing with '-'.
3. Switch machine verifier to use raw_ostream instead of ostream
   (Which is the thing that needed append in the first place).




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79807 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/bugpoint/ExtractFunction.cpp b/tools/bugpoint/ExtractFunction.cpp
index 9fdcc1b..b2e427c 100644
--- a/tools/bugpoint/ExtractFunction.cpp
+++ b/tools/bugpoint/ExtractFunction.cpp
@@ -336,9 +336,8 @@
   sys::RemoveFileOnSignal(uniqueFilename);
 
   std::string ErrorInfo;
-  raw_fd_ostream BlocksToNotExtractFile(uniqueFilename.c_str(),
-                                        /*Binary=*/false, /*Force=*/true,
-                                        ErrorInfo);
+  raw_fd_ostream BlocksToNotExtractFile(uniqueFilename.c_str(), ErrorInfo,
+                                        raw_fd_ostream::F_Force);
   if (!ErrorInfo.empty()) {
     outs() << "*** Basic Block extraction failed!\n";
     errs() << "Error writing list of blocks to not extract: " << ErrorInfo