Fixes #4692: RPM postinst output on AIX looks bad because of use of "echo -n"
Merge pull request #289 from jooooooon/bug_4692/rpm_postinst_output_on_aix_looks_bad_because_of_use_of_echo_n

Fixes #4692: RPM postinst output on AIX looks bad because of use of "ech...