[ng] all: deps for the 'all' target listed in '$(am.all.targets)'

[ng] all: deps for the 'all' target listed in '$(am.all.targets)'

* automake.in (handle_all_and_check): Drop transform 'ALL-DEPS' when
processing the 'all-target.am' file.
(generate_makefile): Define '$(am.all.targets)' as the list of
dependencies for the 'all' target.
* lib/am/all-target.am: Use it instead of the transform '%ALL-DEPS%'.
* t/java.sh: Relax grepping checks to avoid spurious failures.
* t/amopts-variable-expansion.sh: Likewise.

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