ninja: Reduce size of individual_generated_bindings by another 45kB / 15%.

ninja: Reduce size of individual_generated_bindings by another 45kB / 15%.

1. Only write unique_name for rules on Windows, it's unused elsewhere.
Makes individual_generated_bindings.ninja another 30kB / 10% smaller.

2. Don't include the hash in the rule name: It's not needed since the stamp
file has a qualified path. Saves another 14kB.

BUG=350317
R=scottmg@chromium.org

Committed: https://code.google.com/p/gyp/source/detail?r=1880

[Nico, 2014-03-20 18:08:07]

Makes generated ninja files a tiny bit tinier on non-win

[scottmg, 2014-03-20 19:16:59]

lgtm

[Nico, 2014-03-20 19:18:33]

(I uploaded a 2nd patch set that does slightly more (4 lines instead of 2) 30
seconds before you reviewed; not sure if you saw that)

[Nico, 2014-03-20 19:21:57]

Committed patchset #2 manually as r1880 (presubmit successful).

[scottmg, 2014-03-20 19:29:50]

https://codereview.chromium.org/206153004/diff/20001/pylib/gyp/generator/ninj...
File pylib/gyp/generator/ninja.py (right):

https://codereview.chromium.org/206153004/diff/20001/pylib/gyp/generator/ninj...
pylib/gyp/generator/ninja.py:670: rule['rule_name'], inputs,
order_only=prebuild)]
This tends to have spaces, maybe that'll break something? If it works though,
still LGTM.