libctf, testsuite: don't run without a suitable compiler

libctf, testsuite: don't run without a suitable compiler

We never actually check to see if the compiler supports CTF,
or even if a suitable compiler exists.

libctf/ChangeLog
2021-01-05  Nick Alcock  <nick.alcock@oracle.com>

	* Makefile.am (BASEDIR): New.
	(BFDDIR): Likewise.
	(check-DEJAGNU): Add development.exp to prerequisites.
	(development.exp): New.
	(CONFIG_STATUS_DEPENDENCIES): New.
	(EXTRA_DEJAGNU_SITE_CONFIG): Likewise.
	(DISTCLEANFILES): Likewise.
	* Makefile.in: Regenerated.
	* testsuite/lib/ctf-lib.exp (check_ctf_available): Return boolean.
	* testsuite/libctf-lookup/lookup.exp: Call check_ctf_available.
	* testsuite/libctf-regression/regression.exp: Likewise.