Move the lib/ stuff around a bit

And actually remember to commit the lib/ files...

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/lib/strsep.h b/lib/strsep.h
new file mode 100644
index 0000000..782a360
--- /dev/null
+++ b/lib/strsep.h
@@ -0,0 +1,6 @@
+#ifndef FIO_LIB_H
+#define FIO_LIB_H
+
+char *strsep(char **, const char *);
+
+#endif