vlib: fix build with musl

Type: fix

When building with musl, some transitive includes from glibc are not
present. This patch adds direct includes for the necessary types, and it
also defines _GNU_SOURCE to ensure that the socket types are complete.

Change-Id: Ic69c307b9515fec764c32906b5bc7f1fb34f2525
Signed-off-by: Nathan Moos <nmoos@cisco.com>

src/vlib/log.h

@@ -16,6 +16,7 @@
 #ifndef included_vlib_log_h
 #define included_vlib_log_h
 
+#include <sys/time.h>
 #include <vppinfra/types.h>
 
 #define foreach_vlib_log_level	\

src/vlibmemory/socket_client.c

@@ -19,6 +19,7 @@
 
 #include <stdio.h>
 #define __USE_GNU
+#define _GNU_SOURCE
 #include <sys/socket.h>
 
 #include <svm/ssvm.h>