configure: fix FreeBSD which has sqlite3 in /usr/local

Fixes: #3080
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

configure

@@ -230,7 +230,7 @@ fi
 require 'python3-mako' "You need the mako module for python3: see doc/INSTALL.md" python3 -c 'import mako'
 
 rm -f $CONFIG_VAR_FILE.$$
-$CONFIGURATOR --extra-tests --autotools-style --var-file=$CONFIG_VAR_FILE.$$ --header-file=$CONFIG_HEADER --configurator-cc="$CONFIGURATOR_CC" "$CC" ${CWARNFLAGS-$BASE_WARNFLAGS} $CDEBUGFLAGS $COPTFLAGS <<EOF
+$CONFIGURATOR --extra-tests --autotools-style --var-file=$CONFIG_VAR_FILE.$$ --header-file=$CONFIG_HEADER --configurator-cc="$CONFIGURATOR_CC" "$CC" ${CWARNFLAGS-$BASE_WARNFLAGS} $CDEBUGFLAGS $COPTFLAGS -I/usr/local/include -L/usr/local/lib <<EOF
 var=HAVE_GOOD_LIBSODIUM
 desc=libsodium with IETF chacha20 variants
 style=DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE