Fix incorrect git ignore rule and add missing license files (#25135) (#25138)

Backport #25135 by @yp05327

Co-authored-by: yp05327 <576951401@qq.com>
Co-authored-by: silverwind <me@silverwind.io>

.gitignore

@@ -16,10 +16,6 @@ _test
 .vscode
 __debug_bin
 
-# Architecture specific extensions/prefixes
-*.[568vq]
-[568vq].out
-
 *.cgo1.go
 *.cgo2.c
 _cgo_defun.c