Make run-test report missing files by name

Change-Id: I585f0a99cca8fc0dbb326ef1f2f29db7263166c4
diff --git a/test/run-test b/test/run-test
index 25771ec..795c521 100755
--- a/test/run-test
+++ b/test/run-test
@@ -188,8 +188,13 @@
 td_info="${test_dir}/${info}"
 td_expected="${test_dir}/${expected}"
 
-if [ '!' '(' -r "$td_info" -a -r "$td_expected" ')' ]; then
-    echo "${test_dir}: missing files" 1>&2
+if [ ! -r $td_info ]; then
+    echo "${test_dir}: missing file $td_info" 1>&2
+    exit 1
+fi
+
+if [ ! -r $td_expected ]; then
+    echo "${test_dir}: missing file $td_expected" 1>&2
     exit 1
 fi