Fix bug in writing deps file (Fixes #30156)

Fix bug in writing deps file (Fixes #30156)

Turns out the args were swapped, so we were writing one of our output files with the contents of the deps file. Later the script overrode that output file, so we didn't notice it.

R=zra@google.com

Committed: https://github.com/dart-lang/sdk/commit/239c842b0563ef65d421273615eee1a0c2f1e86a

[Siggi Cherem (dart-lang), 2017-07-13 18:39:23]

Description was changed from

==========
Fix bug in how deps file was written.

BUG=
==========

to

==========
Fix bug in writing deps file (Fixes #30156)

Turns out the args were swapped, so we were writing one of our output files with
the contents of the deps file. Later the script overrode that output file, so we
didn't notice it.
==========

[Siggi Cherem (dart-lang), 2017-07-13 18:39:31]

sigmund@google.com changed reviewers:
+ zra@google.com

[zra, 2017-07-13 19:06:13]

lgtm

[Siggi Cherem (dart-lang), 2017-07-13 19:09:49]

Description was changed from

==========
Fix bug in writing deps file (Fixes #30156)

Turns out the args were swapped, so we were writing one of our output files with
the contents of the deps file. Later the script overrode that output file, so we
didn't notice it.
==========

to

==========
Fix bug in writing deps file (Fixes #30156)

Turns out the args were swapped, so we were writing one of our output files with
the contents of the deps file. Later the script overrode that output file, so we
didn't notice it.

R=zra@google.com

Committed:
https://github.com/dart-lang/sdk/commit/239c842b0563ef65d421273615eee1a0c2f1e86a
==========

[Siggi Cherem (dart-lang), 2017-07-13 19:09:51]

Committed patchset #1 (id:1) manually as
239c842b0563ef65d421273615eee1a0c2f1e86a (presubmit successful).