wm.rake: do not lost TARGET_EXT_DIR.
wm.rake: do not lost TARGET_EXT_DIR.

louisatome/rhodes,rhosilver/rhodes-1,UIKit0/rhodes,rhosilver/rhodes-1,louisatome/rhodes,UIKit0/rhodes,UIKit0/rhodes,UIKit0/rhodes,louisatome/rhodes,UIKit0/rhodes,rhosilver/rhodes-1,rhosilver/rhodes-1,rhosilver/rhodes-1,UIKit0/rhodes,louisatome/rhodes,louisatome/rhodes,louisatome/rhodes,rhosilver/rhodes-1,UIKit0/rhodes,louisatome/rhodes,rhosilver/rhodes-1,UIKit0/rhodes,rhosilver/rhodes-1,UIKit0/rhodes,rhosilver/rhodes-1,rhosilver/rhodes-1,louisatome/rhodes,louisatome/rhodes,UIKit0/rhodes