Bump up hardcoded CMake version

Change-Id: Ie74bdcd9e15a2047a560ea61635f9365f5180fe4
Reviewed-on: http://review.couchbase.org/29280
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>