DEBUG: stream: Add the missing descriptions for stream trace events

The description for STRM_EV_FLT_ANA and STRM_EV_FLT_ERR was missing.

This patch should be backported as far as 2.2.
diff --git a/src/stream.c b/src/stream.c
index 90d7c22..44fc4c9 100644
--- a/src/stream.c
+++ b/src/stream.c
@@ -99,6 +99,9 @@
 
 	{ .mask = STRM_EV_TCP_ANA,      .name = "tcp_ana",      .desc = "TCP analyzers" },
 	{ .mask = STRM_EV_TCP_ERR,      .name = "tcp_err",      .desc = "error during TCP analyzis" },
+
+	{ .mask = STRM_EV_FLT_ANA,      .name = "flt_ana",      .desc = "Filter analyzers" },
+	{ .mask = STRM_EV_FLT_ERR,      .name = "flt_err",      .desc = "error during filter analyzis" },
 	{}
 };