Fix error reporting in the PNaCl bitcode reader.

tools/pnacl-llc/pnacl-llc.cpp

Index: tools/pnacl-llc/pnacl-llc.cpp
diff --git a/tools/pnacl-llc/pnacl-llc.cpp b/tools/pnacl-llc/pnacl-llc.cpp
index 5aefdf4e001f1716fb68a2658873b66152d31714..e9fe6779c1841f2396ea83529e0abc520694249e 100644
--- a/tools/pnacl-llc/pnacl-llc.cpp
+++ b/tools/pnacl-llc/pnacl-llc.cpp
@@ -325,10 +325,19 @@ static Module* getModule(StringRef ProgramName, LLVMContext &Context,
   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,