Add linux/sched.h to list of libbpf.c includes

This should hopefully fix compile errors on some ubuntu systems.

Also, reorders the includes according to clang-format
Signed-off-by: Brenden Blanco <bblanco@gmail.com>

src/cc/libbpf.c

@@ -19,25 +19,26 @@
 #include <fcntl.h>
 #include <limits.h>
 #include <linux/bpf.h>
+#include <linux/bpf_common.h>
 #include <linux/if_packet.h>
-#include <linux/pkt_cls.h>
 #include <linux/perf_event.h>
+#include <linux/pkt_cls.h>
 #include <linux/rtnetlink.h>
+#include <linux/sched.h>
 #include <linux/unistd.h>
 #include <linux/version.h>
-#include <linux/bpf_common.h>
 #include <net/ethernet.h>
 #include <net/if.h>
 #include <sched.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
 #include <sys/resource.h>
-#include <unistd.h>
-#include <stdbool.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 #include "libbpf.h"
 #include "perf_reader.h"