Looks like the binary is present on OS X even when Java is not
installed, and it returns an error when called.
Change-Id: Icbd42637f718a4fc05e65ea3973a584d1f24850e
Reviewed-on: https://go-review.googlesource.com/12743
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>