Mention file name when a test fails to parse error markers

[JoshuaKGoldberg]

Feature request

Is your feature request related to a problem? Please describe.

Error: Bad error marker at {"startCol":0,"endCol":1,"message":"Opening brace cannot be followed by empty line"}
    at Object.printLine (C:\Code\tslint-microsoft-contrib\node_modules\tslint\lib\verify\lines.js:138:23)
    at C:\Code\tslint-microsoft-contrib\node_modules\tslint\lib\verify\parse.js:240:157
    at Object.mapDefined (C:\Code\tslint-microsoft-contrib\node_modules\tslint\lib\utils.js:161:22)
    at C:\Code\tslint-microsoft-contrib\node_modules\tslint\lib\verify\parse.js:240:88
    at Object.flatMap (C:\Code\tslint-microsoft-contrib\node_modules\tslint\lib\utils.js:151:29)
    at Object.createMarkupFromErrors (C:\Code\tslint-microsoft-contrib\node_modules\tslint\lib\verify\parse.js:240:20)
    at _loop_1 (C:\Code\tslint-microsoft-contrib\node_modules\tslint\lib\test.js:157:37)
    at runTest (C:\Code\tslint-microsoft-contrib\node_modules\tslint\lib\test.js:164:9)
    at C:\Code\tslint-microsoft-contrib\node_modules\tslint\lib\test.js:41:52
    at Array.map (<anonymous>)

This doesn't mention which file name is there, so when you've made multiple file changes, it can be annoying to plumb through to find the right one.

Describe the solution you'd like

Error: Bad error marker in tests/no-empty-line-after-opening-brace/test.ts.lint at {"startCol":0,"endCol":1,"message":"Opening brace cannot be followed by empty line"}

Additional context

See failures in this build: https://travis-ci.org/Microsoft/tslint-microsoft-contrib/jobs/463096039 from this PR commit: microsoft/tslint-microsoft-contrib@95d0307