Add drivers to CLEAN_SUBDIRS

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@34733 15284696-431f-4ddb-bdfa-cd5b030d7da7

db/Makefile

@@ -16,6 +16,8 @@ SUBDIRS = \
 	db.select \
 	db.tables
 
+CLEAN_SUBDIRS = drivers
+
 PGM = databaseintro
 
 include $(MODULE_TOPDIR)/include/Make/Dir.make