imgcodecs: exclude rle8.bmp from GDAL tests
imgcodecs: exclude rle8.bmp from GDAL tests

GDAL message:
- ERROR 1: The BMP file is probably corrupted or too large. Image width = 480

opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv