viewer.git/buildscripts_support_functions, branch 26.1.1

viewer.git/buildscripts_support_functions, branch 26.1.1 Megapahit's fork of the Second Life viewer. https://megapahit.org/viewer.git/atom?h=26.1.1 2023-06-28T20:58:32Z SL-18837: Get buildscripts_support_functions from sling-buildscripts 2023-06-28T20:58:32Z Nat Goodspeed nat@lindenlab.com 2023-06-28T20:58:32Z urn:sha1:d2294841b2df66f4e684b5eed1cae955cea21cf8 and use these variants for GitHub builds.