MemLogLib didn't compile.

update Clover.dsc and refit.inf

Clover.dsc

@@ -144,6 +144,13 @@
   # To save size, use NULL library for DebugLib and ReportStatusCodeLib.
   # If need status code output, do library instance overriden as below DxeMain.inf does
   #
+
+!ifdef DEBUG_ON_SERIAL_PORT
+  BaseSerialPortLib|MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
+!else
+  BaseSerialPortLib|MdePkg/Library/BaseSerialPortLibNull/BaseSerialPortLibNull.inf
+!endif
+  BaseDebugPrintErrorLevelLib|MdePkg/Library/BaseDebugPrintErrorLevelLib/BaseDebugPrintErrorLevelLib.inf
   DebugLib|MdePkg/Library/BaseDebugLibNull/BaseDebugLibNull.inf
   DebugPrintErrorLevelLib|MdePkg/Library/BaseDebugPrintErrorLevelLib/BaseDebugPrintErrorLevelLib.inf
   ReportStatusCodeLib|MdePkg/Library/BaseReportStatusCodeLibNull/BaseReportStatusCodeLibNull.inf

Library/MemLogLibDefault/MemLogLib.c

@@ -514,7 +514,8 @@ MemLogfVA (
                              Marker);
 //  mMemLog->Cursor += DataWritten;
 // vsnprintf doesn't return the number of char printed. TODO will do it soon in printf_lite
-  mMemLog->Cursor += AsciiStrLen(mMemLog->Cursor);
+  UINTN LastMessageLen = AsciiStrLen(mMemLog->Cursor);
+  mMemLog->Cursor += LastMessageLen;
 
   //
   // Pass this last message to callback if defined
@@ -533,7 +534,7 @@ MemLogfVA (
   // Write to standard debug device also
   //
   // Jief : use SerialPortWrite instead of DebugPrint to avoid 256 chars message length limitation.
-  SerialPortWrite((UINT8*)LastMessage, len);
+  SerialPortWrite((UINT8*)LastMessage, LastMessageLen);
 //  DebugPrint(DEBUG_INFO, "%a", LastMessage);
 }
 

rEFIt_UEFI/refit.inf

@@ -345,6 +345,8 @@
   OpensslLib
   NetLib
   WaveLib
+  BaseDebugPrintErrorLevelLib
+  BaseSerialPortLib
 
 [Guids]
   gEfiAcpiTableGuid