/etc/alpine-release is symlink to non-exsisting file

1. ls -l /etc/alpine-release
   lrwxrwxrwx 1 root root 16 Aug 24 14:48 /etc/alpine-release -> /.alpine-release
2. ls -l /.alpine-release
   ls: /.alpine-release: No such file or directory

(from redmine: issue id 418, created on 2010-08-25, closed on 2010-11-01)

• Changesets:
  • Revision eb7fae1c on 2010-10-29T14:25:08Z:

main/alpine-base: release 2.1.0_rc2

fixes #418