bug4811: added and updated README for building the aws-sdk update site

java/com.amazon.aws.aws-java-api.updatesite/README

@@ -0,0 +1,4 @@
+This is the P2 update site project for http://p2.sapsailing.com/p2/aws-sdk.
+Its sibling project com.amazon.aws.aws-java-api can be opened by renaming
+its dot_project file to .project, then importing into Eclipse. See
+com.amazon.aws.aws-java-api/README for further instructions.

java/com.amazon.aws.aws-java-api/README

@@ -1,6 +1,7 @@
 TL;DR
 Keep this project CLOSED in Eclipse unless updating the AWS SDK for the target platform.
-Use ${workspace}/java/com.sap.sailing.targetplatform/scripts/createLocalAwsApiP2Repository.sh
+To open, rename dot_project to .project and import into Eclipse workspace.
+Then use ${workspace}/java/com.sap.sailing.targetplatform/scripts/createLocalAwsApiP2Repository.sh
 
 Details:
 
@@ -46,4 +47,4 @@ It automates the process of fetching the libraries according to the build.gradle
 updates .classpath, pom.xml, build.properties and META-INF/MANIFEST.MF accordingly, then
 runs a Maven build to produce the wrapper bundle's JAR file. This JAR is then copied to the
 update site project's plugins/aws-sdk folder, the feature.xml file for the update site is updated
-to reflect the correct version number, and then the update site is built using Maven.
+to reflect the correct version number, and then the update site is built using Maven.