Revert "Explicitly specify path to strip and dsymutil for linker_driver.py."

This reverts commit 9cc11952e44ef12a6f4b16ff4e310f838bd0319f.

Reason for revert: 
causes compile failure on Mac ASan 64 Builder
https://ci.chromium.org/p/chromium/builders/ci/Mac%20ASan%2064%20Builder/84739
https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8911354223898031376/+/steps/compile/0/stdout


Original change's description:
> Explicitly specify path to strip and dsymutil for linker_driver.py.
> 
> This allows the macOS toolchain to avoid using xcrun to find the path for strip
> and dsymutil.
> 
> Bug: 971452
> Change-Id: Ib3d8865c44e1d95ed2fe22b6393d7e1549f9e621
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1649054
> Reviewed-by: Dirk Pranke <dpranke@chromium.org>
> Commit-Queue: Erik Chen <erikchen@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#666915}

TBR=dpranke@chromium.org,erikchen@chromium.org

Change-Id: Id03189c55b584ec468ebed289206888abe5a0fa1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 971452
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1647599
Reviewed-by: Takashi Sakamoto <tasak@google.com>
Commit-Queue: Takashi Sakamoto <tasak@google.com>
Cr-Original-Commit-Position: refs/heads/master@{#666986}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 2993e88f26894f8388d048417d454aa106de7500
2 files changed