scripts/tags.sh: ignore code of user space tools

User space code in tools/ often reuses names of kernel constructions,
this confuses navigation in the normal kernel code. Let's fix this mess.

Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/tags.sh b/scripts/tags.sh
index c1f6489..6db551e 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -25,6 +25,9 @@
 	tree=${srctree}/
 fi
 
+# ignore userspace tools
+ignore="$ignore ( -path ${tree}tools ) -prune -o"
+
 # Find all available archs
 find_all_archs()
 {