PNaCl TC buidler: Remove several strip invocations from the pruning step for  binaries which are no longer present. Review URL: http://codereview.chromium.org/8425014
PNaCl TC buidler: Remove several strip invocations from the pruning step for 
binaries which are no longer present.
Review URL: http://codereview.chromium.org/8425014

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@7056 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client