makefile: put DESTDIR back, fix make uninstall.

configure.ac

@@ -65,7 +65,7 @@ AC_CONFIG_FILES([src/libknot.pc
 
 # Get Bash completion scripts directory
 bash_completion_dir=""
-PKG_CHECK_VAR([bash_completion_dir], [bash-completion],[completionsdir],[
+PKG_CHECK_VAR([bash_completion_dir], [bash-completionXXX],[completionsdir],[
   AC_SUBST([BASH_COMPLETION_DIR], [$bash_completion_dir])
   ],[:])
 AM_CONDITIONAL([HAVE_BASH_COMPLETION], [test -n "$bash_completion_dir"])

samples/Makefile.am

@@ -25,16 +25,18 @@ install-data-local: knot.sample.conf
 	  $(INSTALL_DATA) knot.sample.conf $(srcdir)/example.com.zone $(DESTDIR)/$(config_dir); \
 	fi
 if HAVE_BASH_COMPLETION
-	if [ \! -f $(BASH_COMPLETION_DIR)/keymgr ]; then \
-	  $(INSTALL) -d $(BASH_COMPLETION_DIR); \
-	  $(INSTALL_DATA) $(srcdir)/keymgr-completion.sh $(BASH_COMPLETION_DIR)/keymgr; \
+	if [ \! -f $(DESTDIR)/$(BASH_COMPLETION_DIR)/keymgr ]; then \
+	  $(INSTALL) -d $(DESTDIR)/$(BASH_COMPLETION_DIR); \
+	  $(INSTALL_DATA) $(srcdir)/keymgr-completion.sh $(DESTDIR)/$(BASH_COMPLETION_DIR)/keymgr; \
 	fi
 endif # HAVE_BASH_COMPLETION
 
 uninstall-local:
 	-rm -rf $(DESTDIR)/$(config_dir)/knot.sample.conf \
-	        $(DESTDIR)/$(config_dir)/example.com.zone \
-	        $(DESTDIR)/$(sysconfdir)/bash_completion.d/keymgr
+	        $(DESTDIR)/$(config_dir)/example.com.zone
+if HAVE_BASH_COMPLETION
+	-rm -rf $(DESTDIR)/$(BASH_COMPLETION_DIR)/keymgr
+endif # HAVE_BASH_COMPLETION
 
 endif # HAVE_DAEMON