SLING-5648 - Make Non-Eclipse Module regular Maven Packages

Add script to build eclipse plug-ins.
diff --git a/build-eclipse.sh b/build-eclipse.sh
new file mode 100755
index 0000000..1f12194
--- /dev/null
+++ b/build-eclipse.sh
@@ -0,0 +1,5 @@
+#!/bin/sh -e
+
+mvn -f shared/modules clean install
+mvn -f shared/p2 clean package
+mvn -f eclipse clean verify