Add support for threading and atomic ops in QNX Neutrino.

BUG=

Patch by:
Eli Fidler <[email protected]>,
Jeff Rogers <[email protected]>,
Cosmin Truta <[email protected]>.

Review URL: https://codereview.chromium.org/156233002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249390 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index cd5baaad..714b8a7 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -249,6 +249,7 @@
     'OS_NACL',
     'OS_OPENBSD',
     'OS_POSIX',
+    'OS_QNX',
     'OS_SOLARIS',
     'OS_WIN',
 )