when gtk+ configures, it should pick up ${NM} from the environment \
if it is defined, instead of just looking for "nm".
(From OE-Core rev: 7cb5063d8bc59534dc64b19164cb9bdf0c04c68b)
Signed-off-by: Xiaofeng Yan <xiaofeng.yan@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>