Allow Xv to be found.
--- config.tests/xv/xv.pro.orig	Thu Jan 12 22:33:39 2017
+++ config.tests/xv/xv.pro	Fri Jan 13 14:13:21 2017
@@ -3,4 +3,6 @@ CONFIG += console
 
 SOURCES += main.cpp
 
-LIBS += -lXv
+INCLUDEPATH += $$QMAKE_INCDIR_X11
+
+LIBS += -L$$QMAKE_LIBDIR_X11 -lXv
