target/xtensa/import_core.sh: fix #include <xtensa-isa.h>

Change #include <xtensa-isa.h> to #include "xtensa-isa.h" in imported
files to make references to local files consistent.

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
1 file changed