Removed the bucket from the app name when checking directories.

[Ardelean-Calin]

In the app manifest, specifying dependencies with the bucket on which to find that dependency is supported (see the flutter manifest for an example). The problem, however, is that when running scoop status after installing an app such as flutter, we get an error message that some dependencies are supposedly missing:

This message is however wrong, since oraclejdk8 was successfully installed. The problem is that flutter checks if a dependency is installed by checking whether a directory with the name of that dependency exists in the apps folder. In this case it checks for the folder java/oraclejdk8, doesn't find it, since it actually exists as oraclejdk8 and marks the dependency as being not satisfied.

This small pull request fixes that:

[r15ch13]

installed() is doing the right thing, but app_status() is passing in the wrong data:
https://github.com/lukesampson/scoop/blob/88040972a30b459a3859c7c2f883e47e19da9f84/lib/core.ps1#L117

Changing it to the following would be better.

    $deps = @(runtime_deps $manifest) | Where-Object {
        $app, $bucket, $null = parse_app $_
        return !(installed $app)
    }

Your change can still be used as a fallback.