main/postmarketos-base: add replace alpine-release sub-package
Address the following build error:
(330/653) Installing postmarketos-base (21-r0)
ERROR: postmarketos-base-21-r0: trying to overwrite etc/issue owned by alpine-release-3.17_alpha20220809-r1.
ERROR: postmarketos-base-21-r0: trying to overwrite etc/os-release owned by alpine-release-3.17_alpha20220809-r1.
Upstream commit: https://git.alpinelinux.org/aports/commit/?id=23e66e85c95beef9d3f72a2ccc510671fdb3462d