Initial commit of Kconfig build tool.

This is a pure copy of the tool from the Linux v2.6.38-rc2
scripts/kconfig/ directory.
diff --git a/tools/kconfig/lkc_proto.h b/tools/kconfig/lkc_proto.h
new file mode 100644
index 0000000..17342fe
--- /dev/null
+++ b/tools/kconfig/lkc_proto.h
@@ -0,0 +1,53 @@
+#include <stdarg.h>
+
+/* confdata.c */
+P(conf_parse,void,(const char *name));
+P(conf_read,int,(const char *name));
+P(conf_read_simple,int,(const char *name, int));
+P(conf_write_defconfig,int,(const char *name));
+P(conf_write,int,(const char *name));
+P(conf_write_autoconf,int,(void));
+P(conf_get_changed,bool,(void));
+P(conf_set_changed_callback, void,(void (*fn)(void)));
+P(conf_set_message_callback, void,(void (*fn)(const char *fmt, va_list ap)));
+
+/* menu.c */
+P(rootmenu,struct menu,);
+
+P(menu_is_visible, bool, (struct menu *menu));
+P(menu_has_prompt, bool, (struct menu *menu));
+P(menu_get_prompt,const char *,(struct menu *menu));
+P(menu_get_root_menu,struct menu *,(struct menu *menu));
+P(menu_get_parent_menu,struct menu *,(struct menu *menu));
+P(menu_has_help,bool,(struct menu *menu));
+P(menu_get_help,const char *,(struct menu *menu));
+P(get_symbol_str, void, (struct gstr *r, struct symbol *sym));
+P(get_relations_str, struct gstr, (struct symbol **sym_arr));
+P(menu_get_ext_help,void,(struct menu *menu, struct gstr *help));
+
+/* symbol.c */
+P(symbol_hash,struct symbol *,[SYMBOL_HASHSIZE]);
+
+P(sym_lookup,struct symbol *,(const char *name, int flags));
+P(sym_find,struct symbol *,(const char *name));
+P(sym_expand_string_value,const char *,(const char *in));
+P(sym_re_search,struct symbol **,(const char *pattern));
+P(sym_type_name,const char *,(enum symbol_type type));
+P(sym_calc_value,void,(struct symbol *sym));
+P(sym_get_type,enum symbol_type,(struct symbol *sym));
+P(sym_tristate_within_range,bool,(struct symbol *sym,tristate tri));
+P(sym_set_tristate_value,bool,(struct symbol *sym,tristate tri));
+P(sym_toggle_tristate_value,tristate,(struct symbol *sym));
+P(sym_string_valid,bool,(struct symbol *sym, const char *newval));
+P(sym_string_within_range,bool,(struct symbol *sym, const char *str));
+P(sym_set_string_value,bool,(struct symbol *sym, const char *newval));
+P(sym_is_changable,bool,(struct symbol *sym));
+P(sym_get_choice_prop,struct property *,(struct symbol *sym));
+P(sym_get_default_prop,struct property *,(struct symbol *sym));
+P(sym_get_string_value,const char *,(struct symbol *sym));
+
+P(prop_get_type_name,const char *,(enum prop_type type));
+
+/* expr.c */
+P(expr_compare_type,int,(enum expr_type t1, enum expr_type t2));
+P(expr_print,void,(struct expr *e, void (*fn)(void *, struct symbol *, const char *), void *data, int prevtoken));