Added support for GCC 13 (#2452)

GCC Does not explicitly include stdint. This update includes them where needed.
A very minor change that would allow GCC13 and above to compile
correctly. In newer versions, cstdint is not implicitly included, hence
it errors out during compilation for some files.

src/Http/strCoding.h

@@ -13,7 +13,7 @@
 
 #include <iostream>
 #include <string>
-
+#include <cstdint>
 namespace mediakit {
 
 class strCoding {

src/Record/HlsMaker.h

@@ -14,6 +14,7 @@
 #include <string>
 #include <deque>
 #include <tuple>
+#include <cstdint>
 
 namespace mediakit {
 

src/Rtmp/amf.h

@@ -16,6 +16,7 @@
 #include <vector>
 #include <map>
 #include <functional>
+#include <cstdint>
 namespace toolkit {
     class BufferLikeString;
 }