Revert of [build] Use sysroot for linux compilation with clang

Revert of [build] Use sysroot for linux compilation with clang (patchset #5 id:80001 of https://codereview.chromium.org/2028623002/ )

Reason for revert:
sysroot logic breaks "make arm"

Original issue's description:
> [build] Use sysroot for linux compilation with clang
>
> This ports the configuration for using a sysroot from
> chromium's common.gypi.
>
> This is restricted to clang only.
>
> BUG=chromium:474921, chromium:616032
> LOG=y
>
> Committed: https://crrev.com/c47d3c63695d2999752f5fc61ff171f3ff100553
> Cr-Commit-Position: refs/heads/master@{#36729}

TBR=jochen@chromium.org,vogelheim@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:474921, chromium:616032
Committed: https://crrev.com/0e2d92967db1d7502b5b5bed5813dca901ebdf97
Cr-Commit-Position: refs/heads/master@{#36741}

[Michael Achenbach, 2016-06-06 11:00:34]

The CQ bit was checked by machenbach@chromium.org

[Michael Achenbach, 2016-06-06 11:00:35]

Created Revert of [build] Use sysroot for linux compilation with clang

[commit-bot: I haz the power, 2016-06-06 11:00:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2042693003/1

[commit-bot: I haz the power, 2016-06-06 11:02:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-06 11:04:34]

Description was changed from

==========
Revert of [build] Use sysroot for linux compilation with clang (patchset #5
id:80001 of https://codereview.chromium.org/2028623002/ )

Reason for revert:
sysroot logic breaks "make arm"

Original issue's description:
> [build] Use sysroot for linux compilation with clang
> 
> This ports the configuration for using a sysroot from
> chromium's common.gypi.
> 
> This is restricted to clang only.
> 
> BUG=chromium:474921, chromium:616032
> LOG=y
> 
> Committed: https://crrev.com/c47d3c63695d2999752f5fc61ff171f3ff100553
> Cr-Commit-Position: refs/heads/master@{#36729}

TBR=jochen@chromium.org,vogelheim@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:474921, chromium:616032
==========

to

==========
Revert of [build] Use sysroot for linux compilation with clang (patchset #5
id:80001 of https://codereview.chromium.org/2028623002/ )

Reason for revert:
sysroot logic breaks "make arm"

Original issue's description:
> [build] Use sysroot for linux compilation with clang
>
> This ports the configuration for using a sysroot from
> chromium's common.gypi.
>
> This is restricted to clang only.
>
> BUG=chromium:474921, chromium:616032
> LOG=y
>
> Committed: https://crrev.com/c47d3c63695d2999752f5fc61ff171f3ff100553
> Cr-Commit-Position: refs/heads/master@{#36729}

TBR=jochen@chromium.org,vogelheim@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:474921, chromium:616032

Committed: https://crrev.com/0e2d92967db1d7502b5b5bed5813dca901ebdf97
Cr-Commit-Position: refs/heads/master@{#36741}
==========

[commit-bot: I haz the power, 2016-06-06 11:04:35]

Patchset 1 (id:??) landed as
https://crrev.com/0e2d92967db1d7502b5b5bed5813dca901ebdf97
Cr-Commit-Position: refs/heads/master@{#36741}