And replace the plugin with instructions for rebuilding the .aar files for the bind and ivy examples. While here, fix a compile error in the Ivy example caused by gomobile no longer prepending org.golang. to its generated Java packages by default. Fixes golang/go#25314 Fixes golang/go#28098 Fixes golang/go#25184 Change-Id: Iaccdd50850a185414ebcf21427cfd7f625c6a298 Reviewed-on: https://go-review.googlesource.com/c/141057 Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>