Unbreak build on Fedora 32 (gcc 10.0.1)

It requires cstdint in a few more headers.

src/Anon.h

@@ -12,6 +12,7 @@
 
 #include <vector>
 #include <map>
+#include <cstdint>
 
 // TODO: Anon.h may not be the right place to put these functions ...
 

src/Notifier.h

@@ -8,6 +8,7 @@
 #pragma once
 
 #include <unordered_map>
+#include <cstdint>
 
 namespace notifier  {
 

src/Reassem.h

@@ -9,6 +9,7 @@
 #include <assert.h>
 #include <string.h>
 #include <sys/types.h> // for u_char
+#include <cstdint>
 
 // Whenever subclassing the Reassembler class
 // you should add to this for known subclasses.