Fix definition of V8_LIBRT_NOT_AVAILABLE in v8.gyp since we test for it using #elif in time.cc.

TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/23718004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16460 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/gyp/v8.gyp

@@ -742,7 +742,7 @@
                 'target_conditions': [
                   ['_toolset=="host"', {
                     'defines': [
-                      'V8_LIBRT_NOT_AVAILABLE',
+                      'V8_LIBRT_NOT_AVAILABLE=1',
                     ],
                   }],
                 ],