Fix error reporting in the PNaCl bitcode reader.

tools/llvm-dis/llvm-dis.cpp

 //===-- llvm-dis.cpp - The low-level LLVM disassembler --------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This utility may be invoked in the following manner:
@@ skipping 144 matching lines @@
     // @LOCALMOD-BEGIN
     switch (InputFileFormat) {
       case LLVMFormat:
         // The Module's BitcodeReader's BitstreamReader takes ownership
         // of the StreamingMemoryObject.
         M.reset(getStreamedBitcodeModule(
             DisplayFilename, Buffer.release(), Context, &ErrorMessage));
         break;
       case PNaClFormat:
         M.reset(getNaClStreamedBitcodeModule(
-            DisplayFilename, Buffer.release(), Context, &ErrorMessage));
+            DisplayFilename, Buffer.release(), Context,
+            /*VerboseErrors=*/true, &ErrorMessage));
         break;
       default:
         ErrorMessage = "Don't understand specified bitcode format";
         break;
     }
     // @LOCALMOD-END
 
     if(M.get()) {
       if (std::error_code EC = M->materializeAllPermanently()) {
         ErrorMessage = EC.message();
@@ skipping 43 matching lines @@
 
   // All that llvm-dis does is write the assembly to a file.
   if (!DontPrint)
     M->print(Out->os(), Annotator.get());
 
   // Declare success.
   Out->keep();
 
   return 0;
 }