tests: use "Exit $fail", not (exit $fail); exit $fail

* tests/test-lib.sh (Exit): New function by Ralf Wildenhues in automake
http://git.sv.gnu.org/gitweb/?p=automake.git;a=commitdiff;h=20594c08f63
* tests/**: Convert all uses:

This restrictive change converted the vast majority:

  git grep -l '^(exit \$fail); exit \$fail$' \
    | xargs perl -pi -e 's/'^\(exit \$fail\); exit \$fail$/Exit \$fail/'

And this did the rest, plus a few undesirable ones, so I manually
backed out the changes to ChangeLog-* and build-aux/check.mk:

  git grep -l -E '\(exit [^)]+\); exit ' \
    | xargs perl -pi -e 's/\(exit (.+?)\); exit \1/Exit $1/'

4 files changed, 4 insertions, 4 deletions

diff --git a/tests/chown/basic b/tests/chown/basic
index 434a6bac2..5c7c4d287 100755
--- a/tests/chown/basic
+++ b/tests/chown/basic
@@ -50,4 +50,4 @@ chown --no-dereference --from=0:1 2:010 slink || fail=1
 # owner/group on the symlink should be changed
 set _ `ls -n slink`; shift; test "$3:$4" = 2:10 || fail=1
 
-(exit $fail); exit $fail
+Exit $fail
diff --git a/tests/chown/deref b/tests/chown/deref
index 4a46827c2..33ba94665 100755
--- a/tests/chown/deref
+++ b/tests/chown/deref
@@ -40,4 +40,4 @@ EOF
 
 compare out exp || fail=1
 
-(exit $fail); exit $fail
+Exit $fail
diff --git a/tests/chown/preserve-root b/tests/chown/preserve-root
index 8e2923bf0..0dfcdc211 100755
--- a/tests/chown/preserve-root
+++ b/tests/chown/preserve-root
@@ -68,4 +68,4 @@ EOF
 
 compare out exp || fail=1
 
-(exit $fail); exit $fail
+Exit $fail
diff --git a/tests/chown/separator b/tests/chown/separator
index cfd5f0c7e..a8a6600c8 100755
--- a/tests/chown/separator
+++ b/tests/chown/separator
@@ -65,4 +65,4 @@ for u in $id_u "$id_un" ''; do
   done
 done
 
-(exit $fail); exit $fail
+Exit $fail