Fix error reporting in the PNaCl bitcode reader.

tools/pnacl-llc/pnacl-llc.cpp

 //===-- pnacl-llc.cpp - PNaCl-specific llc: pexe ---> nexe  ---------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // pnacl-llc: the core of the PNaCl translator, compiling a pexe into a nexe.
@@ skipping 307 matching lines @@
   }
   Reporter.reset();
 }
 
 static Module* getModule(StringRef ProgramName, LLVMContext &Context,
                          StreamingMemoryObject *StreamingObject) {
   Module *M = nullptr;
   SMDiagnostic Err;
   if (LazyBitcode) {
     std::string StrError;
+    bool VerboseErrors =
+#if defined(__native_client__)
+        false
+#else
+        /* Print useful parse errors when not sandboxed */
+        true
+#endif
+        ;
     if (InputFileFormat == PNaClFormat) {
       M = getNaClStreamedBitcodeModule(
           InputFilename,
-          new ThreadedStreamingCache(StreamingObject), Context, &StrError);
+          new ThreadedStreamingCache(StreamingObject),
+          Context, VerboseErrors, &StrError);
     } else if (InputFileFormat == LLVMFormat) {
       M = getStreamedBitcodeModule(
           InputFilename,
           new ThreadedStreamingCache(StreamingObject), Context, &StrError);
     } else {
       llvm_unreachable("Unknown bitcode format");
     }
     if (!StrError.empty())
       Err = SMDiagnostic(InputFilename, SourceMgr::DK_Error, StrError);
   } else {
@@ skipping 425 matching lines @@
   return 0;
 }
 
 int main(int argc, char **argv) {
 #if defined(__native_client__)
   return srpc_main(argc, argv);
 #else
   return llc_main(argc, argv);
 #endif // __native_client__
 }