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/readlink/can-e b/tests/readlink/can-e
index 72c2c5cd3..6316ff98f 100755
--- a/tests/readlink/can-e
+++ b/tests/readlink/can-e
@@ -107,4 +107,4 @@ for p in "" "$pwd/$tmp/"; do
   test -z "$v" || fail=1
 done
 
-(exit $fail); exit $fail
+Exit $fail
diff --git a/tests/readlink/can-f b/tests/readlink/can-f
index 67f84b92f..9e19eb015 100755
--- a/tests/readlink/can-f
+++ b/tests/readlink/can-f
@@ -140,4 +140,4 @@ for p in "" "$pwd/$tmp/"; do
   test -z "$v" || fail=1
 done
 
-(exit $fail); exit $fail
+Exit $fail
diff --git a/tests/readlink/can-m b/tests/readlink/can-m
index 24f98c985..d20dcd73b 100755
--- a/tests/readlink/can-m
+++ b/tests/readlink/can-m
@@ -144,4 +144,4 @@ for p in "" "$pwd/$tmp/"; do
 
 done
 
-(exit $fail); exit $fail
+Exit $fail
diff --git a/tests/readlink/rl-1 b/tests/readlink/rl-1
index 91401b0f4..cdde35bae 100755
--- a/tests/readlink/rl-1
+++ b/tests/readlink/rl-1
@@ -45,4 +45,4 @@ test -z "$v" || fail=1
 v=`readlink missing` && fail=1
 test -z "$v" || fail=1
 
-(exit $fail); exit $fail
+Exit $fail