uqmi: Set build dir as same source dir
uqmi: Set build dir as same source dir

Fix error:
    /bin/sh: 1: ./data/gen-header.pl: not found

Signed-off-by: Fabio Berton <698e00bc51ed22392b375ef5a2fc95be5c8355a9@ossystems.com.br>

kraj/meta-openwrt