gsettings-qt: fix cross gsettings-qt.pc file

The pkgconfig file also contained a wrong, extra path component

srcpkgs/gsettings-qt/template

@@ -1,7 +1,7 @@
 # Template file for 'gsettings-qt'
 pkgname=gsettings-qt
 version=0.1+17.10.20170824
-revision=1
+revision=2
 build_style=qmake
 hostmakedepends="qt5-qmake pkg-config qt5-declarative"
 makedepends="qt5-devel qt5-declarative-devel glib-devel"
@@ -28,6 +28,8 @@ post_install() {
 	if [ "$CROSS_BUILD" ]; then
 		rm -r ${DESTDIR}/usr/${XBPS_CROSS_TRIPLET}/usr/tests
 		cp -a ${DESTDIR}/usr/${XBPS_CROSS_TRIPLET}/usr/* ${DESTDIR}/usr/
+		vsed -i ${DESTDIR}/usr/lib/pkgconfig/gsettings-qt.pc \
+			-e "s;${XBPS_CROSS_TRIPLET}\${prefix}/;;"
 	else
 		rm -r ${DESTDIR}/usr/tests
 	fi