MdeModulePkg DxeCapsuleLibFmp: Free HandleBuffer after it is used

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleLib.c

@@ -610,6 +610,8 @@ DumpAllFmpInfo (
     FreePool(FmpImageInfoBuf);
   }
 
+  FreePool (HandleBuffer);
+
   return ;
 }
 
@@ -777,6 +779,8 @@ GetFmpHandleBufferByType (
     FreePool(FmpImageInfoBuf);
   }
 
+  FreePool (HandleBuffer);
+
   if (MatchedNumberOfHandles == 0) {
     return EFI_NOT_FOUND;
   }