util: Include stdint.h because of uint32_t

Some files are using uint32_t or int64_t without including
stdint.h which defines them. Fix this.

src/util/virhash.h

@@ -13,6 +13,8 @@
 #ifndef __VIR_HASH_H__
 # define __VIR_HASH_H__
 
+# include <stdint.h>
+
 /*
  * The hash table.
  */

src/util/virhashcode.h

@@ -29,6 +29,7 @@
 # define __VIR_HASH_CODE_H__
 
 # include "internal.h"
+# include <stdint.h>
 
 extern uint32_t virHashCodeGen(const void *key, size_t len, uint32_t seed);
 

src/util/virrandom.h

@@ -23,6 +23,7 @@
 # define __VIR_RANDOM_H__
 
 # include "internal.h"
+# include <stdint.h>
 
 int virRandomInitialize(uint32_t seed) ATTRIBUTE_RETURN_CHECK;
 uint64_t virRandomBits(int nbits);