add func_attr_printf in :

log.c
message.c
strings.c

fixed some printf warnings in:

src/nvim/undo.c
src/nvim/eval.c
src/nvim/eval/encode.c
src/nvim/eval/typval.c
src/nvim/ex_getln.c
src/nvim/fileio.c
src/nvim/lua/executor.c
src/nvim/main.c
src/nvim/regexp_nfa.c
src/nvim/shada.c
src/nvim/spellfile.c
src/nvim/tui/terminfo.c
src/nvim/garray.h

src/nvim/lua/executor.c

@@ -291,7 +291,7 @@ static int nlua_print(lua_State *const lstate)
   return 0;
 nlua_print_error:
   emsgf(_("E5114: Error while converting print argument #%i: %.*s"),
-        curargidx, errmsg_len, errmsg);
+        curargidx, (int)errmsg_len, errmsg);
   ga_clear(&msg_ga);
   lua_pop(lstate, lua_gettop(lstate));
   return 0;