Add git-hg/updateforesttags.sh (#340)
Add git-hg/updateforesttags.sh (#340)

* Add git-hg/updatetags8. Initial version hard coded with tags and pauses for manual merging

* Miscellanous updates to tidy up the 'work in progress' version :-)

* Second round of updates to tidy up the script

* Rename updatetags8.sh to updateforesttags.sh

AdoptOpenJDK/openjdk-build,karianna/openjdk-build,karianna/openjdk-build,AdoptOpenJDK/openjdk-build