This reverts commit 7ac6edf9.

Reason for revert: Fails on gcc (https://build.chromium.org/p/client.v8/builders/V8%20Linux%20gcc%204.8/builds/17623)

Original change's description:
> [builtins] Add .incbin cctest
> 
> Just to ensure this is portable across all platforms.
> 
> Credits go to https://github.com/graphitemaster/incbin, bits of the
> .incbin code were taken from there. Thanks!
> 
> Bug: v8:6666
> Change-Id: Id068f70fb4ac925b574a14dec40cf80627a22073
> Reviewed-on: https://chromium-review.googlesource.com/881181
> Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#50883}

TBR=yangguo@chromium.org,jgruber@chromium.org

Change-Id: Ibf4527e068afffb5380839a0936992087903135e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6666
Reviewed-on: https://chromium-review.googlesource.com/888620Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50884}