Makes analyzer always output static_libraries that have changed
This is to deal with static_libraries not being compile dependencies.
In particular if we only output the topmost ancestor that depends upon
the static library then the static library may not get built if the
ancestor is a static_library itself.
BUG=gyp:141
TEST=covered by test
R=thakis@chromium.org
Review URL: https://codereview.chromium.org/1142323006