mojom: Remove braces from module statements and make them come first.

mojom: Remove braces from module statements and make them come first.

So, instead of:

import "bar.mojom";
module foo {
  ...
}

You'll do:

module foo;
import "bar.mojom";
...

(Note that the grammar in the parser doesn't capture the ordering
constraint. It's hard to do so while keeping the grammar LR(1) AFAICT.
So instead we enforce the ordering "manually".)

Also delete mojo/spy/PRESUBMIT.py since it's broken. We'll delete
mojo/spy separately.

R=jamesr@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/a08257c158b67dee27fba993b518fa67ff725a06

[jamesr, 2014-10-31 19:58:56]

lgtm

[viettrungluu, 2014-10-31 20:00:55]

Committed patchset #1 (id:1) manually as
a08257c158b67dee27fba993b518fa67ff725a06 (presubmit successful).