[Ada] Switch from ACATS 2.6 to ACATS 4.2 testsuite

[Eric Botcazou]

This effectively adds 250 new tests, i.e. around 10% more tests.

Tested on x86-64/Linux, applied on the mainline.


2025-07-04  Eric Botcazou  <ebotca...@adacore.com>

        * gcc-interface/Make-lang.in (ACATSDIR): Change to acats-4.

-- 
Eric Botcazou
diff --git a/gcc/ada/gcc-interface/Make-lang.in b/gcc/ada/gcc-interface/Make-lang.in
index 1c93816b319..bbbd697eb6f 100644
--- a/gcc/ada/gcc-interface/Make-lang.in
+++ b/gcc/ada/gcc-interface/Make-lang.in
@@ -1096,7 +1096,7 @@ check-ada-subtargets: check-acats-subtargets check-gnat-subtargets
 # No ada-specific selftests
 selftest-ada:
 
-ACATSDIR = $(TESTSUITEDIR)/ada/acats-2
+ACATSDIR = $(TESTSUITEDIR)/ada/acats-4
 ACATSCMD = run_acats.sh
 
 check_acats_numbers0:=1 2 3 4 5 6 7 8 9