ash testsuite: remove two inadvertent bashisms

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

shell/ash_test/ash-read/read_r.tests

@@ -1,2 +1,4 @@
-echo -e 'test\\\nbest' | (read reply; echo "$reply")
-echo -e 'test\\\nbest' | (read -r reply; echo "$reply")
+echo 'test\
+best' | (read reply; echo "$reply")
+echo 'test\
+best' | (read -r reply; echo "$reply")

shell/ash_test/ash-signals/signal1.tests

@@ -19,7 +19,7 @@ while $sleeping; do
     if wait %%; then
         echo "sleep completed"
         sleeping=false
-    elif [ $? == 127 ]; then
+    elif [ $? = 127 ]; then
         echo "BUG: no processes to wait for?!"
         sleeping=false
     else