[MCL-2487] Snapshot 14w18b not fully downloading Twitch linux library throws 403 error

When attempting to download the files for snapshot 14w18b the launcher throws this exception three times and then doesn't launch the game:

Couldn't download https://libraries.minecraft.net/tv/twitch/twitch-platform/6.5/twitch-platform-6.5-natives-linux.jar for job 'Version & Libraries'
java.lang.RuntimeException: Server responded with 403
	at com.mojang.launcher.updater.download.ChecksummedDownloadable.download(ChecksummedDownloadable.java:97) ~[launcher.jar:?]
	at com.mojang.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:108) [launcher.jar:?]
	at com.mojang.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:?]
	at com.mojang.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:89) [launcher.jar:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_05]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_05]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_05]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_05]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_05]