BaseTools: Use absolute import in Ecc

Based on "futurize -f libfuturize.fixes.fix_absolute_import

Contributed-under: TianoCore Contribution Agreement 1.1
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>

BaseTools/Source/Python/Ecc/FileProfile.py

@@ -16,9 +16,10 @@
 # Import Modules
 #
 
+from __future__ import absolute_import
 import re
 import Common.LongFilePathOs as os
-from ParserWarning import Warning
+from .ParserWarning import Warning
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
 CommentList = []
@@ -54,5 +55,3 @@ class FileProfile :
 
         except IOError:
             raise Warning("Error when opening file %s" % FileName)
-
-