Revert of PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS (patchset #1 id:1 of https://codereview.chromium.org/1058603002/)
Revert of PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS (patchset #1 id:1 of https://codereview.chromium.org/1058603002/)

Reason for revert:
Failed to do the configure build correctly. Will fix separately.

Original issue's description:
> PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS
>
> This pulls in the following LLVM change:
>
> cf7f1bb: (jfb@chromium.org) Add JSBackend
>
> BUG= https://code.google.com/p/nativeclient/issues/detail?id=4102
> TEST= PNaCl toolchain trybots
> TBR= dschuff@chromium.org
>
> Committed: https://chromium.googlesource.com/native_client/src/native_client/+/6e8abe3c330bd9f6dbcea735aec433e2f88c47f7

TBR=dschuff@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG= https://code.google.com/p/nativeclient/issues/detail?id=4102

Review URL: https://codereview.chromium.org/1056553004

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client