zephyr/prj_base.conf: Add config for net_buf logging.

Disabled by default.

zephyr/prj_base.conf

@@ -15,3 +15,9 @@ CONFIG_NET_UDP=y
 CONFIG_NET_TCP=y
 CONFIG_TEST_RANDOM_GENERATOR=y
 CONFIG_NET_NBUF_RX_COUNT=5
+
+# Uncomment to enable "INFO" level net_buf logging
+#CONFIG_NET_LOG=y
+#CONFIG_NET_DEBUG_NET_BUF=y
+# Change to 4 for "DEBUG" level
+#CONFIG_SYS_LOG_NET_LEVEL=3