Updated the build tools version in the travis config
Updated the build tools version in the travis config

jason-p-pickering/chailmis-android,jason-p-pickering/chailmis-android,clintonhealthaccess/chailmis-android,clintonhealthaccess/chailmis-android,jason-p-pickering/chailmis-android,clintonhealthaccess/chailmis-android,jason-p-pickering/chailmis-android,clintonhealthaccess/chailmis-android,clintonhealthaccess/chailmis-android,jason-p-pickering/chailmis-android