MB-10852: Add ld_library_path

Change-Id: I25c9e06a0026c7973b53bb71b9d4b8d11528685e
Reviewed-on: http://review.couchbase.org/35728
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Bin Cui <bin.cui@gmail.com>