BaseTools: Use absolute import in Workspace

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/Workspace/WorkspaceDatabase.py

@@ -15,15 +15,16 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import sqlite3
 from Common.StringUtils import *
 from Common.DataType import *
 from Common.Misc import *
 from types import *
 
-from MetaDataTable import *
-from MetaFileTable import *
-from MetaFileParser import *
+from .MetaDataTable import *
+from .MetaFileTable import *
+from .MetaFileParser import *
 
 from Workspace.DecBuildData import DecBuildData
 from Workspace.DscBuildData import DscBuildData