Use CURDIR instead of PWD in debian/rules

The PWD variable is not set by GNU make and therefore will have whatever
value it has in the environment, which may not be the actual current directory.

See: https://lintian.debian.org/tags/debian-rules-calls-pwd



Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

debian/rules

@@ -25,4 +25,4 @@ override_dh_auto_build:
 	ninja -v -C ${BUILDDIR}
 
 override_dh_auto_install:
-	DESTDIR=${PWD}/debian/apertis-update-manager ninja install -v -C ${BUILDDIR}
+	DESTDIR=${CURDIR}/debian/apertis-update-manager ninja install -v -C ${BUILDDIR}