fix example links (#3328)

Author: neozwu

google-cloud-logging/README.md

@@ -36,7 +36,7 @@ libraryDependencies += "com.google.cloud" % "google-cloud-logging" % "1.31.0"
 
 Example Application
 -------------------
-[`LoggingExample`](../google-cloud-examples/src/main/java/com/google/cloud/examples/logging/LoggingExample.java)
+[`LoggingExample`](../../google-cloud-examples/src/main/java/com/google/cloud/examples/logging/LoggingExample.java)
 is a simple command line interface that provides some of Stackdriver Logging's functionality. Read
 more about using the application on the
 [`LoggingExample` docs page](https://googlecloudplatform.github.io/google-cloud-java/apidocs/?com/google/cloud/examples/logging/LoggingExample.html).
@@ -175,10 +175,10 @@ com.google.cloud.examples.logging.snippets.AddLoggingHandler.handlers=com.google
 #### Complete source code
 
 In
-[CreateAndListMetrics.java](../google-cloud-examples/src/main/java/com/google/cloud/examples/logging/snippets/CreateAndListMetrics.java),
-[WriteAndListLogEntries.java](../google-cloud-examples/src/main/java/com/google/cloud/examples/logging/snippets/WriteAndListLogEntries.java)
+[CreateAndListMetrics.java](../../google-cloud-examples/src/main/java/com/google/cloud/examples/logging/snippets/CreateAndListMetrics.java),
+[WriteAndListLogEntries.java](../../google-cloud-examples/src/main/java/com/google/cloud/examples/logging/snippets/WriteAndListLogEntries.java)
 and
-[AddLoggingHandler.java](../google-cloud-examples/src/main/java/com/google/cloud/examples/logging/snippets/AddLoggingHandler.java)
+[AddLoggingHandler.java](../../google-cloud-examples/src/main/java/com/google/cloud/examples/logging/snippets/AddLoggingHandler.java)
 we put together all the code shown above into three programs. The programs assume that you are
 running on Compute Engine or from your own desktop.