.gitignore: move *.lex.c *.tab.[ch] patterns to the top-level .gitignore

These patterns are common to host programs that require lexer and parser.
Move them to the top .gitignore.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Frank Rowand <frowand.list@gmail.com>

.gitignore

@@ -22,6 +22,7 @@
 *.gz
 *.i
 *.ko
+*.lex.c
 *.ll
 *.lst
 *.lz4
@@ -37,6 +38,7 @@
 *.so.dbg
 *.su
 *.symtypes
+*.tab.[ch]
 *.tar
 *.xz
 Module.symvers