message: pagespeed_libraries.conf: add jquery 3.4.1
diff: ModPagespeedLibrary 86571 Y8jX7FH_5HXT4o9AiUSuO //ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js
  # jquery/3.2.1/jquery.js:
  ModPagespeedLibrary 137702 xZH2zNe7lEsAz1OIiiB-g //ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js
  + # jquery/3.4.1/jquery.min.js:
  + ModPagespeedLibrary 88059 tJmcu2pzqbMS9jXP915aU //ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js
  + # jquery/3.4.1/jquery.js:
  + ModPagespeedLibrary 141767 YMjN_PDe4cETVTWLoSfvI //ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js
  # jquerymobile/1.4.0/jquery.mobile.min.js:
  ModPagespeedLibrary 193066 pkv8dHWLVaOlDGcgh0PYe //ajax.googleapis.com/ajax/libs/jquerymobile/1.4.0/jquery.mobile.min.js
  # jquerymobile/1.4.0/jquery.mobile.js:
  