Add time display to debug Kokoro timeout

test/cpp/ios/build_and_run_tests.sh

@@ -22,7 +22,7 @@ cd "$(dirname "$0")"
 
 echo "TIME:  $(date)"
 
-./build_tests.sh
+./build_tests.sh | ./verbose_time.sh
 
 echo "TIME:  $(date)"
 
@@ -35,5 +35,6 @@ xcodebuild \
     -scheme CronetTests \
     -destination name="iPhone 8" \
     test \
+    | ./verbose_time.sh
     | egrep -v "$XCODEBUILD_FILTER" \
     | egrep -v '^$' -

test/cpp/ios/verbose_time.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+while IFS= read -r line; do
+  echo "$(date) - $line"
+done