Update 1) gnc block global set to ready at startup 2) using sprintf and print log only after a certain NR_MODE_SWITCHES

Small updates to Demo_CoRAMBAD_Brave_GR740_GNC: cyclic period 1s, mode change, init gnc global var with fpga status.

This test is a skeleton basis for testing Ada-C memory alignment for complex
types. The application sends a message to the gui and expects to receive
the same message.