binutils: fix .init/.fini literals moving in xtensa gas

Despite the documentation and the comment in xtensa_move_literals, in
the presence of --text-section-literals and --auto-litpools literals are
moved from the separate literal sections into .init and .fini, because
the check in the xtensa_move_literals is incorrect.

This fixes build errors seen with projects that have .init/.fini and use
text-section-literals.

Backported from: 4111950f363221c4641dc2f33bea61cc94f34906
Reported-by: Waldemar Brodkorb <mail@waldemar-brodkorb.de>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>