RFR: JDK-8038957 DEBUG_BINARIES can be removed

[Tim Bell]

Magnus:

> The configure scripts still contains some left-over crud from the old
> hotspot build, amongst them DEBUG_BINARIES that are not used anymore.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8038957
> WebRev:
> http://cr.openjdk.java.net/~ihse/JDK-8038957-remove_DEBUG_BINARIES/webrev.01

Looks good to me.

/Tim