fix(files): allow any throwable in logException

If a TypeError is passed here, it in turn causes a TypeError which
kills the rendering of the error page.

Signed-off-by: Varun Patil <varunpatil@ucla.edu>

apps/dav/lib/Files/BrowserErrorPagePlugin.php

@@ -70,9 +70,9 @@ public static function isBrowserRequest(IRequest $request) {
 	}
 
 	/**
-	 * @param \Exception $ex
+	 * @param \Throwable $ex
 	 */
-	public function logException(\Exception $ex) {
+	public function logException(\Throwable $ex) {
 		if ($ex instanceof Exception) {
 			$httpCode = $ex->getHTTPCode();
 			$headers = $ex->getHTTPHeaders($this->server);