travis-ci / dpl / 1277

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travis-ci

Construct file path properly when includePattern starts with '('

Given

```
{
    "files":
    [{"includePattern": "(.*\\.deb)", "uploadPattern": "$1",
        "matrixParams": {
            "deb_distribution": "stable",
            "deb_component": "main",
            "deb_architecture": "amd64"}
    }
    ]
}
```

We would end up with "" as `root_path`, and we get

```
[Bintray Upload] Warning: Path:  does not exist.
```

This commit fixes this issue.

1 of 1 new or added line in 1 file covered. (100.0%)

1548 of 1910 relevant lines covered (81.05%)

320.87 hits per line