Update apt_packages to include new mysql name (#2173)

libmysqlclient-dev is no longer available after Debian Jessie (oldstable). It is now default-libmysqlclient-dev.

https://packages.debian.org/search?searchon=names&keywords=libmysqlclient-dev

install/dependencies/apt_packages.txt

@@ -3,9 +3,9 @@ build-essential
 git
 libffi-dev
 libssl-dev
-libmysqlclient-dev
+default-libmysqlclient-dev
 libpython-dev
 python-pip
 python-dev
 unzip
-wget
+wget