The UPM Cordova binding generator creates Cordova plugs for each Java
package when BUILDCORDOVA=ON and BUILDSWIGJAVA=ON. This requires an NPM
install of the UPM Cordova plugin generator. Cordova bindings are built
under <build-dir>/cordova.
Signed-off-by: Noel Eck <noel.eck@intel.com>
