scanner: skip symlinks to avoid issues

If they resolve to a missing file, we don't care about them. If they resolve
to an existing file, we'll scan that file anyway.

fdroidserver/scanner.py

@@ -140,8 +140,11 @@ def scan_source(build_dir, root_dir, thisbuild):
 
             # Path (relative) to the file
             fp = os.path.join(r, curfile)
-            fd = fp[len(build_dir) + 1:]
 
+            if os.path.islink(fp):
+                continue
+
+            fd = fp[len(build_dir) + 1:]
             ext = common.get_extension(fd)
 
             if ext == 'so':