debian/rules: use $(CURDIR) instead of $$(pwd)

Avoid invoking the shell when make already has the needed information.

diff --git a/debian/rules b/debian/rules
index 53bb7f1..7d0681e 100755 (executable)
--- a/debian/rules
+++ b/debian/rules
@@ -4,4 +4,4 @@
        dh $@ 
 
 override_dh_auto_install:
-       $(MAKE) DESTDIR=$$(pwd)/debian/tweeper prefix=/usr install
+       $(MAKE) DESTDIR=$(CURDIR)/debian/tweeper prefix=/usr install