biology/gatk: mark BROKEN

FAILURE: Build failed with an exception.

• Where:

Build file '/wrkdirs/usr/ports/biology/gatk/work/gatk-4.2.6.1/build.gradle' line: 15

• What went wrong:

Plugin [id: 'de.undercouch.download', version: '4.1.2'] was not found in any of the following sources:

• Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
• Plugin Repositories (could not resolve plugin artifact 'de.undercouch.download:de.undercouch.download.gradle.plugin:4.1.2') Searched in the following repositories: Gradle Central Plugin Repository

Reported by: pkg-fallout
Approved by: portmgr blanket