Revert "orderfile: Only instrument non-host toolchains"

This reverts commit 2beecec0e1bf534a1831cd7541ecd1c24b366b3f.

Reason for revert: The system allocator toolchains no longer exist
as the CL was reverted. Will fix this in the next reland then, in
https://chromium-review.googlesource.com/c/chromium/src/+/5645742

Original change's description:
> orderfile: Only instrument non-host toolchains
>
> Now that some tools are built with the host malloc (see:
> https://crrev.com/c/5639356), we need to be more specific for the
> orderfile to only instrument targets that are not built using the
> host-specific toolchains. Anything that runs host-only does not need to
> be instrumented (as it won't be in libmonochrome.so).
>
> This fixes the orderfile bot failing to run gn gen.
>
> Bug: 347976629
> Change-Id: I8770811d852f8699511876b74014fd1f9aa07933
> Fixed: 347976629
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5641875
> Reviewed-by: Egor Pasko <pasko@chromium.org>
> Commit-Queue: Peter Wen <wnwen@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1317071}

Bug: 347976629
Change-Id: Ibcd4bf125978902354dbb0756f5bf3bb6f26dbc3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5645604
Commit-Queue: Mei Liang <meiliang@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Mei Liang <meiliang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1317431}

• build/config/BUILD.gn[diff]