Update ninja to 9b8e55d

On Linux, I did a full ninja checkout and then ran:
python bootstrap.py
./configure.py --with-gtest=../chrome/src/testing/gtest
./ninja ninja_test
./ninja_test # (all tests passed)
strip ninja

I timed empty builds of 'chrome' with the old and the new version,
both took 1.1s for that. Binary size comparison:
121632 bytes old binary
129920 bytes new binary
I used gcc 4.4.3 to build ninja.


On Mac, I updated an existing checkout to the latest version and then ran:
CXX=../chrome-git/src/third_party/llvm-build/Release+Asserts/bin/clang++ \
./configure.py --with-gtest=../chrome-git/src/testing/gtest
./ninja
./ninja ninja_test # (all tests passed)
strip ninja

I timed empty builds of 'chrome' with the old and the new version,
both took 1.1s for that. Binary size comparison:
128976 bytes old binary
120904 bytes new binary
I used clang r155352 to build ninja. Last time I used gcc 4.2, which
explains the size drop.


The major new features in this update are:
* ninja cleans up files when interrupted mid-build
* NINJA_STATUS environment variable to tweak the status line
(see ninja manual)


Also set svn:mimetype to application/octet-stream on both files.
Review URL: https://chromiumcodereview.appspot.com/10221020/



git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@134307 0039d316-1c4b-4281-b951-d872f2087c98