Fix bug: excluded modules in one package would be implicitly excluded from packages that depend on it This fixes the lack of 'xml' package in the 'morepy' package.
Fix bug: excluded modules in one package would be implicitly excluded from packages that depend on it
This fixes the lack of 'xml' package in the 'morepy' package.

matthiascy/panda3d,grimfang/panda3d,brakhane/panda3d,mgracer48/panda3d,chandler14362/panda3d,brakhane/panda3d,mgracer48/panda3d,matthiascy/panda3d,Wilee999/panda3d,mgracer48/panda3d,brakhane/panda3d,chandler14362/panda3d,brakhane/panda3d,chandler14362/panda3d,Wilee999/panda3d,grimfang/panda3d,mgracer48/panda3d,Wilee999/panda3d,brakhane/panda3d,chandler14362/panda3d,chandler14362/panda3d,Wilee999/panda3d,tobspr/panda3d,Wilee999/panda3d,Wilee999/panda3d,brakhane/panda3d,grimfang/panda3d,Wilee999/panda3d,matthiascy/panda3d,matthiascy/panda3d,mgracer48/panda3d,mgracer48/panda3d,tobspr/panda3d,chandler14362/panda3d,chandler14362/panda3d,mgracer48/panda3d,grimfang/panda3d,grimfang/panda3d,mgracer48/panda3d,Wilee999/panda3d,tobspr/panda3d,tobspr/panda3d,tobspr/panda3d,brakhane/panda3d,grimfang/panda3d,grimfang/panda3d,grimfang/panda3d,brakhane/panda3d,matthiascy/panda3d,tobspr/panda3d,mgracer48/panda3d,chandler14362/panda3d,tobspr/panda3d,brakhane/panda3d,chandler14362/panda3d,grimfang/panda3d,Wilee999/panda3d,matthiascy/panda3d,chandler14362/panda3d,tobspr/panda3d,tobspr/panda3d,tobspr/panda3d,matthiascy/panda3d,matthiascy/panda3d,matthiascy/panda3d,grimfang/panda3d