gbproxy: Change generic LOG messages so BVCI/NSEI fmt is consistent

We actually need to alter our compiler flags to avoid -Werror=trigraphs
creating trouble:

gb_proxy.c: In function ‘block_unblock_peer’:
gb_proxy.c:875:37: error: trigraph ??) ignored, use -trigraphs to enable [-Werror=trigraphs]
  875 |   LOGP(DGPRS, LOGL_ERROR, "BVC(%05u/??) Cannot find BSS\n",
      |

Fixes: SYS#5233
Change-Id: I93296353dd964602699480faae1248096e331c6a
3 files changed