Revert "Merge pull request #1097 from drinkcat/revert-1076"

This reverts commit 435f1f04070319d7a9be1ecc50aad97aedd77097, reversing
changes made to 8f33bd231245d73621bc69583759f8635983ac8a.
targets/audio: wget --content-on-error does not work on precise
Merge pull request #1102 from drinkcat/cras-version-master-fallback-fix

targets/audio: If commit id is not found, fall back on master (take 2)