libpkg: prevent unused param warning from sqlite3_profile callback func
libpkg: prevent unused param warning from sqlite3_profile callback func

pkgdb_profile_callback() acts as the profile callback function for
sqlite3_profile() and must respect the callback function signature.
Hence, prevent 'unused parameter' warning from being emitted.

skoef/pkg,khorben/pkg,junovitch/pkg,en90/pkg,skoef/pkg,Open343/pkg,khorben/pkg,Open343/pkg,en90/pkg,junovitch/pkg,khorben/pkg