Update src/build.lock to get the latest revision available in the
stable/antelope branch, among the most relevant patches are:
837a8b58 Support legacy cert requests (#799)
580c7764 Update Makefile to be consistent with CI (#777) (#795)
a2468260 Run CI on stable branches (#786) (#787)
ed014373 Update method for checking endpoint protocol (#769) (#775)
Change-Id: Iec412c6990ffae3b4f42b0ca2c64a209202a252e