release: Update for 1.9.0~beta7

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10725 ddefafc4-47db-0310-ae44-fa13212b10f2
repro: improve conditional build for DSO

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10726 ddefafc4-47db-0310-ae44-fa13212b10f2
build: correct WIN32 artefacts in EXTRA_DIST

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10727 ddefafc4-47db-0310-ae44-fa13212b10f2