compile: don't place built object files in $(srcdir), ever ... ... even when a source file is specified as '$(srdir)/foo.c' or '$(top_srcdir)/bar.c'. And ditto for dependency-tracking makefile fragments (those under '.deps' directories). Such issues used to occur when the 'subdir-objects' option was given. This change should fix the second and last part of automake bug#13928. See also bug#16375 and bug#15293. * NEWS: Update. * bin/automake.in (handle_single_transform): Make sure object files and dependency-tracking makefile fragments coming from source like '$(srcdir)/foo.c' and '$(top_srcdir)/bar.c' are placed respectively under $(builddir) and $(top_builddir). * t/subobj-vpath-pr13928.sh: Enhance to expose even more aspects of the bug we've just fixed. * t/subobj-pr13928-more-langs.sh: New test, similar to the one above, but with non-C languages as well. * t/list-of-tests.mk (XFAIL_TESTS): Remove 'subobj-vpath-pr13928.sh', it's now supposed to pass. (handwritten_TESTS): Add 'subobj-pr13928-more-langs.sh'. Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>