Fix cleanup on program creation failure

Change-Id: Ibc9b96537f774a3b8a43848b8b626f3f036b07b3
Reviewed-on: https://skia-review.googlesource.com/29561
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
9 files changed