logging: switch networkd static_library to lg2

This commit switches logging to lg2 in the following files -
1. src/dhcp_configuration.cpp
2. src/dhcp_configuration.cpp
3. src/ipaddress.cpp
4. src/system_configuration.cpp
5. src/system_queries.cpp

Tested: Build passes with "ninja -C build".

Change-Id: I492c7579c968810b783836b652e450ff89b8cd4b
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>
5 files changed