Make the type of buildArgs executed by Codelens consistent with Launc…

…hRequestArguments

This fix the problem that `go.buildTags` is ignored by `debug test`.

src/goRunTestCodelens.ts

@@ -85,7 +85,7 @@ export class GoRunTestCodeLensProvider extends GoBaseCodeLensProvider {
 					buildFlags.push(`"${vsConfig['buildTags']}"`);
 				}
 
-				let config = Object.assign({}, this.debugConfig, { args, program, env, envFile, buildFlags });
+				let config = Object.assign({}, this.debugConfig, { args, program, env, envFile, buildFlags: buildFlags.join(' ') });
 				let debugTestCmd: Command = {
 					title: 'debug test',
 					command: 'vscode.startDebug',