git(xpp): Update submodule ref (#1647)

This fixes the link failure when configured with -DBUILD_SHARED_LIBS=ON
as reported in #1628. xpp will now always build a static lib

Ref jaagr/xpp#15
This commit is contained in:
Patrick Ziegler
2019-02-18 15:52:34 +01:00
committed by patrick96
parent ca0da3d9ac
commit 2e2c02b8df

Submodule lib/xpp updated: bf6ff3661a...ab6247ba7b