Build lib/_internal/analysis_summary during SDK build.

Build lib/_internal/analysis_summary during SDK build.

We cannot commit this CL right now, because we will attempt to use
these summaries by default, and they are incomplete yet. But I wanted
to see how to add something to the build process, and we might do
changes to make using SDK summaries optional initiallyand then commit
this CL.

R=paulberry@google.com, whesse@google.com
BUG=

Committed: https://github.com/dart-lang/sdk/commit/427f760c9116ce9657718f8f89dd8f786c27739a

[Paul Berry, 2016-01-15 16:44:04]

lgtm, but I don't really understand the build system very well, so my review
probably doesn't count :)

[Bill Hesse, 2016-02-08 10:27:10]

lgtm

[scheglov, 2016-02-19 22:39:48]

PTAL

We generate two summary files: spec.sum and strong.sum now.

If this looks good, I will commit this CL and start experimenting with adding
dartanalyzer tool flags to use/generate summaries.

[Paul Berry, 2016-02-19 22:47:24]

lgtm

[Bill Hesse, 2016-02-19 23:20:27]

LGTM.  Please find the impact on the SDK size, and report that, and the problem
this solves, to all tech leads before committing.

[scheglov, 2016-02-20 03:06:11]

Description was changed from

==========
Build lib/_internal/analysis_summary during SDK build.

We cannot commit this CL right now, because we will attempt to use
these summaries by default, and they are incomplete yet. But I wanted
to see how to add something to the build process, and we might do
changes to make using SDK summaries optional initiallyand then commit
this CL.

R=whesse@google.com,paulberry@google.com
BUG=
==========

to

==========
Build lib/_internal/analysis_summary during SDK build.

We cannot commit this CL right now, because we will attempt to use
these summaries by default, and they are incomplete yet. But I wanted
to see how to add something to the build process, and we might do
changes to make using SDK summaries optional initiallyand then commit
this CL.

R=paulberry@google.com, whesse@google.com
BUG=

Committed:
https://github.com/dart-lang/sdk/commit/427f760c9116ce9657718f8f89dd8f786c27739a
==========

[scheglov, 2016-02-20 03:06:12]

Committed patchset #2 (id:20001) manually as
427f760c9116ce9657718f8f89dd8f786c27739a (presubmit successful).