lyrics: add brazilian/hispanic sources to google CSE

Add some brazilian and hispanic sources to google CSE.

Now that this plugin has been refactored, it's time to get the most from it!
Adding sources requires minimum effort : add source to test file, donwload samples, check that beautifulsoup beats the lyrics out of it ruthlessly.

Only thing is the [CSE](https://www.google.com/cse/all) must be manually updated (but the output of `lyrics_download_samples.py` helps a lot doing sources bulk import). 

Tiny writing nitpicks: "google" -> "Google"; needs period at the end.