BaseTools: Update UPT tool to support multiple workspaces

Update UPT to refer MultipleWorkspace class to convert
the file path from WORKSPACE and PACKAGES_PATH.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hesheng Chen <hesheng.chen@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18580 6f19259b-4bc3-4df7-8a09-765794883524

BaseTools/Source/Python/UPT/Core/PackageFile.py

@@ -37,6 +37,7 @@ from Logger import StringTable as ST
 from Library.Misc import CreateDirectory
 from Library.Misc import RemoveDirectory
 from Core.FileHook import __FileHookOpen__
+from Common.MultipleWorkspace import MultipleWorkspace as mws
 
 
 class PackageFile:
@@ -203,8 +204,11 @@ class PackageFile:
     # @param Files:  the files to pack 
     #
     def PackFiles(self, Files):
-        for File1 in Files:
-            self.PackFile(File1)
+        for File in Files:
+            Cwd = os.getcwd()
+            os.chdir(mws.getWs(mws.WORKSPACE, File))
+            self.PackFile(File)
+            os.chdir(Cwd)
 
     ## Pack the file
     #