component/headless-chromium-test: add executable permissions

component/headless-chromium-test/buildout.cfg

@@ -20,6 +20,7 @@ command =
   mkdir -p ${:path}
   cd ${:path}
   wget http://www.contrib.andrew.cmu.edu/~ericzhen/hc
+  chmod +x hc
 environment =
   PATH=%(PATH)s:${wget:location}/bin
 library-path = ${nspr:location}/lib:${nss:location}/lib