makefiles: change condition

makefiles: change condition

Old system do not work well with -l% in findstring,
so use a different strategy to recognize whether -lreadline needs
another library (-ltinfo, -lncourses...)
(So we don't need to solve this via 'configure')

Also for now comment out -Wl,-z,pack-relative-relocs and leave it
for the package maintainer whether they want to use.
Possibly add some 'configure' autodetection for usable switch,
as it's relatively new feature..