Switch the Ant-build to separate folders under "build/classes"

This avoids colliding in strange ways with the default Gradle location "build/classes/main/java"

This caused very strange error messages about invalid package names when compiling with Gradle and Ant in one source checkout

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1888422 13f79535-47bb-0310-9956-ffa450edef68
1 file changed