fix(xcat-dep): the new control-file test ran after done_testing

The architecture-coverage block was appended at the end of t/sbuild-all.t, past
done_testing. Test::More had already declared the plan, so the run ended with
"planned 194 tests but ran 197" and the three assertions counted for nothing.

Move the block above done_testing.

Signed-off-by: Daniel Hilst <392820+dhilst@users.noreply.github.com>

t/sbuild-all.t

@@ -619,8 +619,6 @@ STUB
         'missing_perl_modules: an absent module is reported');
 }
 
-done_testing;
-
 # ---- every compiled dep must be buildable on every architecture xcat-dep supports -------------
 # A debian/control that names architectures explicitly silently excludes the ones it omits:
 # debhelper prints "No packages to build. Possible architecture mismatch: <arch>, want: <list>",
@@ -647,3 +645,5 @@ done_testing;
         }
     }
 }
+
+done_testing;