[profile] Fix binary format reader error propagation.

[mtrofin]

Summary

This was originally part of rL328132, and led to the discovery
of the issues addressed in rL328987. Re-landing.

[bkramer]

lg

llvm/trunk/lib/ProfileData/InstrProfReader.cpp

Error RawInstrProfReader<IntPtrT>::readValueProfilingData(
   return success();
 }
 
 template <class IntPtrT>
 Error RawInstrProfReader<IntPtrT>::readNextRecord(NamedInstrProfRecord &Record) {
   if (atEnd())
     // At this point, ValueDataStart field points to the next header.
     if (Error E = readNextHeader(getNextHeaderPos()))
-      return E;
+      return error(std::move(E));
 
   // Read name ad set it in Record.
   if (Error E = readName(Record))
-    return E;
+    return error(std::move(E));
 
   // Read FuncHash and set it in Record.
   if (Error E = readFuncHash(Record))
-    return E;
+    return error(std::move(E));
 
   // Read raw counts and set Record.
   if (Error E = readRawCounts(Record))
-    return E;
+    return error(std::move(E));
 
   // Read value data and set Record.
   if (Error E = readValueProfilingData(Record))
-    return E;
+    return error(std::move(E));
 
   // Iterate.
   advanceData();
   return success();
 }
 
 namespace llvm {