[BUILD] stats: stdint is not present on solaris

It was added with commit cec9a227 to use uint32_t, though it does
not exist on solaris 8 but is not needed either.

src/dumpstats.c

@@ -15,7 +15,6 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <stdbool.h>
-#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>