[Buildroot] [PATCH v2 2/2] classpath: Use generic check for host program

[Thomas De Schampheleire]

Maxime Hadjinlian <maxime.hadjinlian at gmail.com> schreef:
>Remove the specific check that was done in dependencies.sh to use the
>generic one that were introduced by the previous patch.
>
>Also, introduce, BR2_NEEDS_HOST_JAVAC and BR2_NEEDS_HOST_JAR.
>In a following patch, we will remove the specific check done for
>classpath, and the classpath package will use these generic variant.

This commit message is no longer accurate after moving some parts from the first patch...

But content-wise: 
Reviewed-by: Thomas De Schampheleire <thomas.de.schampheleire at gmail.com>