This reverts commit 4f9d7a94.

Reason for revert: breaks roll:
https://chromium-review.googlesource.com/c/chromium/src/+/1583053

Original change's description:
> [snapshot] Align internal snapshot data
> 
> When the snapshot blob is not aligned properly, loading it can cause a
> crash on platforms such as arm.
> 
> This was exposed by a SIGBUS/BUS_ADRALN crash on arm when accessing
> the blob_data symbol (declared as a byte array) through a reinterpret
> cast to uintptr_t in an internal snapshot build.
> 
> Thanks to florian.dold@gmail.com for the initial patch.
> 
> Bug: v8:9171
> Change-Id: I99b071dec3733416f2f01b58a770e30d8f2dcdf2
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1582402
> Commit-Queue: Dan Elphick <delphick@chromium.org>
> Auto-Submit: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#61000}

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

Change-Id: Ie329fa8948b46d5434a0db72d4bfb539bd25a967
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9171
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1584324Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61017}