configure.ac, utility.cpp: Remove __DATE__, __TIME__
and SMARTMONTOOLS_CONFIGURE_DATE.
This obsoletes OpenSUSE nobuild-date.patch.
Reproducible builds are now supported.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk/smartmontools@3859 4ea69e1a-61f1-4043-bf83-b5c94c648137