EmulatorPkg: formalize line endings

The patch is the result of running
"BaseTools/Scripts/FormatDosFiles.py EmulatorPkg/"

No functionality impact.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>

EmulatorPkg/Library/DxeEmuStdErrSerialPortLib/DxeEmuStdErrSerialPortLib.c

@@ -69,7 +69,7 @@ SerialPortWrite (
   if (gEmuThunk == NULL) {
     return NumberOfBytes;
   }
-  
+
   return gEmuThunk->WriteStdErr (Buffer, NumberOfBytes);
 }