genksyms: migrate parser to implicit rules

Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
diff --git a/scripts/genksyms/.gitignore b/scripts/genksyms/.gitignore
index be5cadb..86dc07a 100644
--- a/scripts/genksyms/.gitignore
+++ b/scripts/genksyms/.gitignore
@@ -1,4 +1,5 @@
-keywords.c
-lex.c
-parse.[ch]
+*.hash.c
+*.lex.c
+*.tab.c
+*.tab.h
 genksyms