Revert "Use the wrapper script in all coverage builds."

This reverts commit 78d6b9950b4bd9462c226b2cc2ac1f74ad84ad6a.

Reason for revert:

This broke the coverage builds, see e.g.
https://ci.chromium.org/p/chromium/builders/ci/ToTLinuxCoverage/6258
which fails with:
"/bin/sh: 1: ../../build/toolchain/clang_code_coverage_wrapper.py--target-os=linux: not found"

I guess there's a missing space before --target-os.

Could this have been found in testing?


Original change's description:
> Use the wrapper script in all coverage builds.
> 
> Previously the wrapper script would only be used for coverage builds
> that required selective instrumentation of specific files. Now it
> will also be used for any coverage builds.
> 
> Since the script's job is to remove flags from files that shouldn't
> have them the default_coverage config now adds to cflags even in a
> CQ build.
> 
> Bug: 918215
> Change-Id: I012c5732d46bf5cff9eaf8f50615739bb781cc29
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1496002
> Commit-Queue: Sajjad Mirza <sajjadm@google.com>
> Reviewed-by: Dirk Pranke <dpranke@chromium.org>
> Reviewed-by: Max Moroz <mmoroz@chromium.org>
> Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#638321}

TBR=stgao@chromium.org,dpranke@chromium.org,robertocn@chromium.org,mmoroz@chromium.org,liaoyuke@chromium.org,sajjadm@google.com

Change-Id: I8a945239dadc84d5e1c55a94ee84e34f413e54d5
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 918215
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1508457
Reviewed-by: Hans Wennborg <hans@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638561}
2 files changed