Check for errors after reading a sample profile in llvm-profdata.

After reading the profile, check if the reader returned any errors
before showing the profile.

llvm-svn: 247873
diff --git a/llvm/tools/llvm-profdata/llvm-profdata.cpp b/llvm/tools/llvm-profdata/llvm-profdata.cpp
index 6fb48d8..23fa7b4 100644
--- a/llvm/tools/llvm-profdata/llvm-profdata.cpp
+++ b/llvm/tools/llvm-profdata/llvm-profdata.cpp
@@ -195,7 +195,9 @@
     exitWithError(EC.message(), Filename);
 
   auto Reader = std::move(ReaderOrErr.get());
-  Reader->read();
+  if (std::error_code EC = Reader->read())
+    exitWithError(EC.message(), Filename);
+
   if (ShowAllFunctions || ShowFunction.empty())
     Reader->dump(OS);
   else