shells: fix var_LINENO1.tests false positive, add it to ash tests too

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

shell/ash_test/ash-vars/var_LINENO1.right

@@ -0,0 +1,8 @@
+2:2
+3:3
+4:4
+5:5
+2:2
+3:3
+4:4
+5:5

shell/ash_test/ash-vars/var_LINENO1.tests

@@ -0,0 +1,6 @@
+env | grep ^LINENO
+echo 2:$LINENO
+echo 3:$LINENO >&2 \
+| { sleep 0.1; echo 4:$LINENO; }
+echo 5:$LINENO
+test "$1" || . ./var_LINENO1.tests norepeat

shell/hush_test/hush-vars/var_LINENO1.tests

@@ -1,4 +1,4 @@
-env | grep LINENO
+env | grep ^LINENO
 echo 2:$LINENO
 echo 3:$LINENO >&2 \
 | { sleep 0.1; echo 4:$LINENO; }