Fix whitespace

Replace spaces by tabs for consistency. The rest of the codebase uses
tabs, so the linkerscript parser has to change.

Removed trailing tabs in all codebase.

Signed-off-by: AntonioND <antonio_nd@outlook.com>

src/gfx/makepng.c

@@ -316,7 +316,7 @@ output_png_file(struct Options opts, struct PNGImage *png)
 	png_init_io(img, f);
 
 	png_write_info(img, png->info);
-	
+
 	png_write_image(img, png->data);
 	png_write_end(img, NULL);