Add apt-get update

Author: miloserdow

lib/run.js

@@ -28,6 +28,9 @@ function install_deps() {
             let runner_ = new toolrunner.ToolRunner('xcode-select',  ['--install']);
             runner_.exec();
         } else {
+            let runner0 = new toolrunner.ToolRunner('sudo',  
+                ['apt-get', 'update']);
+            runner0.exec();
             let runner_ = new toolrunner.ToolRunner('sudo',  
                 ['apt-get', 'install', 'ruby-full', 'build-essential', 'postgresql', 'libpq-dev']);
            yield runner_.exec();