Specify tmpdir for opkg via '-t' option so that opkg does not use
the default 'TMPDIR' which usually is '/tmp' on build host.
This would solve race problems like below.
sh: /tmp/opkg-rOG6Tl/opkg-intercept-iPoEp5/depmod: Permission denied
(From OE-Core rev: 5665e284b7e7ee071201664dc50a3412bd4ac8cd)
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>