Add the first of what will be a long line of additional error checks for invalid Mach-O files.

This is where an LC_SEGMENT load command has a fileoff field that
extends past the end of the file.

Also fix llvm-nm and llvm-size to remove the errorToErrorCode() call so error messages are printed.
And needed to update a few test cases now that they do print the error messages just a
bit differently.

llvm-svn: 277845

llvm/tools/llvm-size/llvm-size.cpp

@@ -521,7 +521,7 @@ static void printFileSectionSizes(StringRef file) {
   // Attempt to open the binary.
   Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(file);
   if (!BinaryOrErr) {
-    error(errorToErrorCode(BinaryOrErr.takeError()));
+    error(BinaryOrErr.takeError(), file);
     return;
   }
   Binary &Bin = *BinaryOrErr.get().getBinary();