awgtpman: create separate testpoint client library and link daqd with it.

awgtpman: testpoint client library now works with DAQ. Testpoint RPC client and direct testpoint access are now separate source files: testpoint.c and testpoint_direct.c.

testpoint_direct.c is compiled only into awgtpman, while testpoint.c is compiled into the 'libtestpoint' static library. This library is now linked into daqd executable, and will eventually be linked into diaggui. This will close the awg fork in cds-crtools.