Skip toolchain downloads for a few android tools

Skip toolchain downloads for a few android tools.

This is an attempt to avoid downloading the android toolchain when not required.
I went through all binaries listed in https://code.google.com/p/chromium/codesearch#chromium/build/scripts/slave/recipe_modules/skia/android_flavor.py except for android_ninja. 

BUG=skia:5119
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1832883002

Committed: https://skia.googlesource.com/skia/+/8ce5912fe3b18aede140ddaeed014427472c1b30

[rmistry, 2016-03-24 16:48:12]

Description was changed from

==========
Only setup/download toolchain for android_make/android_ninja

BUG=skia:5119
==========

to

==========
Only setup/download toolchain for android_make/android_ninja

BUG=skia:5119
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[rmistry, 2016-03-24 16:58:24]

Description was changed from

==========
Only setup/download toolchain for android_make/android_ninja

BUG=skia:5119
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Only setup/download toolchain for android_make/android_ninja

This is an attempt to only download the android toolchain when required.
This also covers android_ninja because it is a symlink to android_make.

BUG=skia:5119
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[rmistry, 2016-03-24 16:59:10]

rmistry@google.com changed reviewers:
+ djsollen@google.com

[rmistry, 2016-03-24 16:59:10]

Derek, WDYT?

[rmistry, 2016-03-24 16:59:19]

Description was changed from

==========
Only setup/download toolchain for android_make/android_ninja

This is an attempt to only download the android toolchain when required.
This also covers android_ninja because it is a symlink to android_make.

BUG=skia:5119
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Only setup/download toolchain for android_make and android_ninja.

This is an attempt to only download the android toolchain when required.
This also covers android_ninja because it is a symlink to android_make.

BUG=skia:5119
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[djsollen, 2016-03-24 19:05:36]

I would do this in reverse where we download the toolchain unless an environment
variable is set to not download it.  Otherwise we need to go into most scripts
and add this flag as we need different parts of the toolchain for other tasks.

[rmistry, 2016-03-28 14:32:46]

Patchset #3 (id:40001) has been deleted

[rmistry, 2016-03-28 14:36:54]

Description was changed from

==========
Only setup/download toolchain for android_make and android_ninja.

This is an attempt to only download the android toolchain when required.
This also covers android_ninja because it is a symlink to android_make.

BUG=skia:5119
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Skip toolchain downloads for a few android tools.

This is an attempt to avoid downloading the android toolchain when not required.
I went through all binaries listed in
https://code.google.com/p/chromium/codesearch#chromium/build/scripts/slave/re...
except for android_ninja. 

BUG=skia:5119
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[rmistry, 2016-03-28 14:39:50]

rmistry@google.com changed reviewers:
+ borenet@google.com

[rmistry, 2016-03-28 14:39:50]

Updated CL to skip toolchain setup when env variable is set.

I went through all binaries listed in
https://code.google.com/p/chromium/codesearch#chromium/build/scripts/slave/re...
except for android_ninja.
Let me know if I included one that should not have been included or if I missed
one.

[djsollen, 2016-03-28 15:42:59]

lgtm

[borenet, 2016-03-28 16:18:26]

LGTM

[rmistry, 2016-03-28 16:25:41]

The CQ bit was checked by rmistry@google.com

[commit-bot: I haz the power, 2016-03-28 16:25:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1832883002/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1832883002/60001

[commit-bot: I haz the power, 2016-03-28 16:35:44]

Description was changed from

==========
Skip toolchain downloads for a few android tools.

This is an attempt to avoid downloading the android toolchain when not required.
I went through all binaries listed in
https://code.google.com/p/chromium/codesearch#chromium/build/scripts/slave/re...
except for android_ninja. 

BUG=skia:5119
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Skip toolchain downloads for a few android tools.

This is an attempt to avoid downloading the android toolchain when not required.
I went through all binaries listed in
https://code.google.com/p/chromium/codesearch#chromium/build/scripts/slave/re...
except for android_ninja. 

BUG=skia:5119
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/8ce5912fe3b18aede140ddaeed014427472c1b30
==========

[commit-bot: I haz the power, 2016-03-28 16:35:45]

Committed patchset #3 (id:60001) as
https://skia.googlesource.com/skia/+/8ce5912fe3b18aede140ddaeed014427472c1b30