* NEWS: Document 'testsuite' command.

	* NEWS: Document 'testsuite' command.
	* doc/dejagnu.texi (testsuite procedure): Document multiplex entry
	point and "testsuite file" command.
	* lib/framework.exp (testsuite): New proc for multiplex commands.
	(testsuite_file): New proc implementing "testsuite file".
	* testsuite/runtest.all/testsuite_file.test: New file.
	* runtest.exp: Expect to find testsuite in ${srcdir}/testsuite,
	but also search $srcdir itself.
	(load_lib): Add explicit search for testsuite-local libraries.
	(load_tool_init): Use $testsuitedir in search.
	(load_config): Use $testsuitedir instead of $srcdir.
	(load_tool_target_config): Likewise.

	Add variable "testsuitedir" for testsuite root directory.

	Add internal global variables "testbuilddir" and "testdir" for use
	by "testsuite file".

	Ensure that $testsuitedir, $testbuilddir, and $objdir also avoid
	duplicated path delimiters.

	Add warning if no tests are found and fallback method of searching
	$srcdir is used.

Signed-off-by: Ben Elliston <bje@gnu.org>