New review comment by TinfoilSubmarine on void-packages repository

https://github.com/void-linux/void-packages/pull/35736#discussion_r812153460

Comment:
Why do we do custom `do_configure`, `do_build`, and `do_install` instead of just letting `build_style=go` do its thing? All you have to do is add
```
go_import_path="git.sr.ht/~rjarry/aerc"
```

to the template and remove the custom `do_configure`, `do_build`, and `do_install`. 

You'll need a custom `post_install` to include all of the docs and configuration files:
```
post_install() {
        make doc
        vman aerc.1
        vman aerc-search.1
        vman aerc-config.5
        vman aerc-imap.5
        vman aerc-maildir.5
        vman aerc-sendmail.5
        vman aerc-notmuch.5
        vman aerc-smtp.5
        vman aerc-tutorial.7
        vman aerc-templates.7
        vman aerc-stylesets.7

        vmkdir usr/share/aerc
        vcopy config/*.conf usr/share/aerc
        vcopy filters usr/share/aerc
        vcopy templates usr/share/aerc
        vinstall config/default_styleset 644 usr/share/aerc/stylesets default

        vinstall contrib/aerc.desktop 644 usr/share/applications

        vlicense LICENSE
}
```

This fixes the LDFLAGS issue w/o needing to unset it.