tests: don't let a known Solaris make bug poison too many tests

tests: don't let a known Solaris make bug poison too many tests

See automake bug#7670 and bug#7824.

* tests/defs (make_can_chain_suffix_rules): New function, tell
whether the make implementation in use can chain suffix rules
automatically or not.
* tests/suffix3.test: Use it to avoid issuing calls to make that
are unportable to make implementations that are not smart enough
to chain suffix rules automatically.
* tests/suffix8.test: Use it to avoid issuing calls to make that
* tests/suffix10.test: Use it to avoid issuing calls to make that
* tests/suffix11.test: Use it to avoid issuing calls to make that
* tests/suffix-chain.test: New test, exposes the limitation that
we have papered over in the tests above.