[NFC] Fix compilation with gcc 5.4

[dfukalov]

Summary

variable name intersected with type name

[dfukalov]

ping

[xbolva00]

Why ping?

Current trunk:

const uint32_t IT = Data.getU32(&Offset);
const uint32_t InfoLength = Data.getU32(&Offset);

So somebody fixed it already..

llvm/lib/DebugInfo/GSYM/FunctionInfo.cpp

llvm::Expected<LookupResult> FunctionInfo::lookup(DataExtractor &Data,
   LR.FuncName = GR.getString(NameOffset);
   bool Done = false;
   Optional<LineEntry> LineEntry;
   Optional<DataExtractor> InlineInfoData;
   while (!Done) {
     if (!Data.isValidOffsetForDataOfSize(Offset, 8))
       return createStringError(std::errc::io_error,
                                "FunctionInfo data is truncated");
-    const uint32_t InfoType = Data.getU32(&Offset);
+    const uint32_t IT = Data.getU32(&Offset);
     const uint32_t InfoLength = Data.getU32(&Offset);
     const StringRef InfoBytes = Data.getData().substr(Offset, InfoLength);
     if (InfoLength != InfoBytes.size())
       return createStringError(std::errc::io_error,
                                "FunctionInfo data is truncated");
     DataExtractor InfoData(InfoBytes, Data.isLittleEndian(),
                            Data.getAddressSize());
-    switch (InfoType) {
+    switch (IT) {
       case InfoType::EndOfList:
         Done = true;
         break;
 
       case InfoType::LineTableInfo:
         if (auto ExpectedLE = LineTable::lookup(InfoData, FuncAddr, Addr))
           LineEntry = ExpectedLE.get();
         else