Make-lang.in (ACATSCMD): New variable.

Make-lang.in (ACATSCMD): New variable.

ada/
	* gcc-interface/Make-lang.in (ACATSCMD): New variable.
	(check-acats): Use it.
	(check_acats_targets): Likewise.
testsuite/
	* ada/acats/run_acats: Rename into...
	* ada/acats/run_acats.sh: ...this.  Only export BASE variable.
	* ada/acats/run_all.sh: Remove redundant test.
	(target_run): Move around.
	(target_gnatchop): Use newly built executable.
	(target_gnatmake): Likewise.
	Check that the compilation of impbit succeeds.

From-SVN: r235678