print "changed function" notice for all changed functions

A local changed function will not appear with a "changed function"
notice if it is a dependency of another changed function and that
function occurs before it in the symbol table.

Rearrange some logic to print the notice regardless of whether or not
the function symbols has already been selected for inclusion.

Signed-off-by: Seth Jennings <sjenning@redhat.com>
do not proceed with output generation if no changed funcs

If there are no changed functions, print notice and exit.

Signed-off-by: Seth Jennings <sjenning@redhat.com>
Merge pull request #82 from spartacus06/fixes

small fixes
reworked version of spec file
Merge pull request #83 from useidel/master

Reworked version of spec file following the discussion of PR 80