[mkgmap-dev] Commit r4177: add unit test that shows that patch tags2.patch doesn't work,

Version mkgmap-r4177 was committed by gerd on Wed, 25 Apr 2018 add unit test that shows that patch tags2.patch doesn't work, no functional change http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4177