Just rethrow previous exception instead of making a new one

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8718 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Bytecode/Reader/Reader.cpp

@@ -654,6 +654,6 @@ BytecodeParser::ParseBytecode(const unsigned char *Buf, unsigned Length,
     freeState();       // Must destroy handles before deleting module!
     delete TheModule;
     TheModule = 0;
-    throw Error;
+    throw;
   }
 }