before calling initlib because initlib calls contructors and may install
drivers, which enable hardware interrupts. Similar for donelib.
See also R3897 and R3951 where this change was done for other platforms.
git-svn-id: svn://svn.cc65.org/cc65/trunk@3954 b7a2c559-68d2-44c3-8de9-860c34a00d81