net/spoofer: fix build on GCC architectures

GCC from ports on GCC architectures fails to build this port when base OpenSSL is used because -L/usr/lib takes over -L/usr/local/lib/gcc9 and in result, base libstdc++ is used instead of the one from ports. Fix this issue with patch to configure script.

PR: 240690
Approved by: linimon (mentor), portmgr (blanket: build fix)