Testsuite keyword 'interactive' and check-* rules.

Testsuite keyword 'interactive' and check-* rules.

* Makefile.am (testsuite_deps, testsuite_deps_uninstalled):
New variables.
(check-local, installcheck-local): Use them.
(check-interactive, check-noninteractive): New rules.
* tests/link-order2.at (Link order of deplibs),
tests/static.at (static linking flags for programs): Add keyword
`interactive'.
* doc/libtool.texi (Test descriptions): Document all keywords
used in the Libtool test suite.
* NEWS: Update.

Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>