requirements: debian, replaced libjpeg package.

+ libjpeg8 -> libjpeg62-turbo-dev
+ Removed comment segment on python3-lxml so we can
  do xargs.

Signed-off-by: rscnt <rascnt@gmail.com>

requirements.debian.txt

@@ -10,14 +10,14 @@ memcached
 libmemcached-dev
 libxml2-dev 
 libxslt1-dev 
-python3-lxml # this depends on the amount of ram that the server has.
+python3-lxml
 libjpeg 
 libjpeg-dev 
 libfreetype6 
 libfreetype6-dev 
 zlib1g-dev
 libtiff5-dev 
-libjpeg8-dev 
+libjpeg62-turbo-dev
 zlib1g-dev 
 libfreetype6-dev 
 liblcms2-dev