Skip only gapi if it was not found

setup.py

@@ -414,7 +414,7 @@ def _classify_installed_files_override(
                     final_install_relpaths.append(new_install_relpath)
                     del m, fslash_relpath, new_install_relpath
                 else:
-                    if not found:
+                    if not found and "gapi" not in relpath_re:
                         raise Exception("Not found: '%s'" % relpath_re)
                 del r, found