Re-Indent CMakeLists

Change-Id: I39325290755d9f04244c828bb14ca2099bcd51e8
Reviewed-on: http://review.couchbase.org/27435
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>