Merge pull request libgit2#5409 from libgit2/pks/coverity-fix-sudo

azure: docker: set up HOME variable to fix Coverity builds

Author: ethomson

azure-pipelines/docker/entrypoint.sh

@@ -1,4 +1,4 @@
 #!/bin/bash -e
 useradd --shell /bin/bash libgit2
 chown --recursive libgit2:libgit2 /home/libgit2
-exec sudo --preserve-env --user=libgit2 "$@"
+exec sudo --preserve-env --set-home --user=libgit2 "$@"