package/thrift: fix libtool warning

Backport an upstream patch.

[Thomas: slightly fix the patch according to Arnout comments.]

Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>