ninja: Let TOC code use $lib instead of ${lib}.

ninja: Let TOC code use $lib instead of ${lib}.

No functionality change, but more consistent with -MF $out.d, and the
generated files shrink by a few bytes too.

R=scottmg@chromium.org

Committed: https://code.google.com/p/gyp/source/detail?r=1853

[scottmg, 2014-02-17 22:05:53]

Oh, I always skimmed over those and thought they were shell-expanded, but
they're ninja-expanded. TIL ninja does {}.

lgtm

[Nico, 2014-02-17 23:01:26]

On 2014/02/17 22:05:53, scottmg wrote:
> Oh, I always skimmed over those and thought they were shell-expanded, but
> they're ninja-expanded. TIL ninja does {}.

It's for when you want to either include a '.' in a variable name (`${lib.TOC}`)
for some reason, or if you want to have two variables expanded without a space
in between (`${postbuilds}touch $out`).

Thanks!

[Nico, 2014-02-17 23:02:23]

Committed patchset #1 manually as r1853 (presubmit successful).