win ninja: default to embedding manifest to match msvs

And add a test for this specific variation.

R=thakis@chromium.org
BUG=chromium:326030

Review URL: https://codereview.chromium.org/103963007

git-svn-id: http://gyp.googlecode.com/svn/trunk@1814 78cadc50-ecff-11dd-a971-7dbc132099af
3 files changed