Merge branch 'maint' into branch-1.11

Merge branch 'maint' into branch-1.11

* maint:
  python: avoid failures due to $(am__py_compile) being undefined
  python: expose automake bug#10995
  tests: avoid spurious failures in get-sysconf.test
  scripts: bump the depcomp scriptversion
  sync: some auxiliary files synced from upstream
  coverage: an empty foo_PRIMARY should create directory $(foodir)
  coverage: make sure am__py_compile is defined when needed
  coverage: expose automake bug#10997

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>