Makefile update libgit.a: Include xdiff and reftable in libgit.a#2065

ezekielnewren wants to merge 2 commits intogit:nextgit/git:nextfrom

ezekielnewren:merge_xdiff_and_reftable_with_libgitezekielnewren/git:merge_xdiff_and_reftable_with_libgitCopy head branch name to clipboard