hisdk.con: modify for daisy support.

1/ linaro-gcc from 4.7 to 4.8
2/ remove tinylogin

Signed-off-by: Haifeng Yan <yanhaifeng@gmail.com>
bblayers.conf.sample: add meta-oe/networking layer.

needed by meta-linaro in daisy branch.

Signed-off-by: Haifeng Yan <yanhaifeng@gmail.com>
qtbase_5.2.1.bbappend: add qt 5.2.1 support.

Signed-off-by: Haifeng Yan <yanhaifeng@gmail.com>