Adds an optional parameter to jsuno::execute to specify a list of global variables to define in the global scope of the running script. The values are references to XInterfaces. Change-Id: I03b7de9fb904f4a172324f0e54c11ff9b0d76134 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/205120 Tested-by: Jenkins Reviewed-by: Neil Roberts <nroberts@libreoffice.org>