* Makefile.am, tests/testsuite.at: Adjust.
* tests/testsuite.at: Reorder tests. Suspend AT_TESTED.
(PREPARE_TESTS): Define EGREP, host, build, LIBTOOL.
(LT_AT_BOOTSTRAP): Fail if autoreconf fails.
(LT_AT_EXEC_CHECK): New macro for execution of $build binaries.
(LT_AT_TAG): New macro to test tag availability or skip test.
* tests/am-subdir.at, tests/duplicate_members.at, tests/inherited_flags.at,
tests/link-order.at, tests/stresstest.at, tests/template.at:
Adjust. Use LT_AT_TAG, LT_AT_EXEC_CHECK, AT_KEYWORDS.
Use compiler/linker flags consistently.
* tests/link-order.at: Fix use of AT_DATA, bogus redirection
inside AT_CHECK.
* tests/stresstest.at: Do not use wildcards/regex in symbol files,
they are not portable. Use -no-undefined on win32. Fix to ignore
compile/link warnings.
