ipv6: rename thunk_linux_386.s to sys_linux_386.s

Change-Id: I8f05f473bb78336dd1ba788cfa09fc02797eb8dd
Reviewed-on: https://go-review.googlesource.com/30174
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/ipv6/thunk_linux_386.s b/ipv6/sys_linux_386.s
similarity index 100%
rename from ipv6/thunk_linux_386.s
rename to ipv6/sys_linux_386.s