Blender: Update sub folder to adopt to blender foundation's packaging changes for Mac OS X

nbi/stub/ext/infra/build/products/blender-macosx/build.properties

@@ -106,7 +106,7 @@ product.data.1.zip=true
 #normen
 product.data.1.uri=http://download.blender.org/release/Blender2.78/blender-2.78b-OSX_10.6-x86_64.zip
 product.data.root=Blender
-product.data.sub.dir=blender-2.78b-OSX_10.6-x86_64
+product.data.sub.dir=
 
 # modificator for the required disk space parameter; the core value will be the
 # sum of unzipped unstallation data files