nss_esr: backport gcc-13 fix

Without the change `nss` build on `gcc-13 `fails as:

    ../../cpputil/databuffer.h:20:20: error: 'uint8_t' does not name a type
       20 |   DataBuffer(const uint8_t* d, size_t l) : data_(nullptr), len_(0) {
          |                    ^~~~~~~
    ../../cpputil/databuffer.h:14:1: note: 'uint8_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
       13 | #include <iostream>
      +++ |+#include <cstdint>
       14 |

pkgs/development/libraries/nss/gcc-13-esr.patch

@@ -0,0 +1,44 @@
+https://bugzilla.mozilla.org/show_bug.cgi?id=1771273
+https://hg.mozilla.org/projects/nss/raw-rev/21e7aaa1f7d94bca15d997e5b4c2329b32fad21a
+
+# HG changeset patch
+# User Sergei Trofimovich <slyich@gmail.com>
+# Date 1653552519 0
+# Node ID 21e7aaa1f7d94bca15d997e5b4c2329b32fad21a
+# Parent  ad1046e9eee5f5dc17dac7c9343e2f7f0da44b4e
+Bug 1771273 - cpputil/databuffer.h: add missing <cstdint> include r=nss-reviewers,mt
+
+Without the change build fails on this week's gcc-13 snapshot as:
+
+    ../../cpputil/databuffer.h:20:20: error: 'uint8_t' does not name a type
+       20 |   DataBuffer(const uint8_t* d, size_t l) : data_(nullptr), len_(0) {
+          |                    ^~~~~~~
+    ../../cpputil/databuffer.h:14:1: note: 'uint8_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
+       13 | #include <iostream>
+      +++ |+#include <cstdint>
+       14 |
+
+Differential Revision: https://phabricator.services.mozilla.com/D147404
+
+diff --git a/cpputil/databuffer.h b/cpputil/databuffer.h
+--- nss/cpputil/databuffer.h
++++ nss/cpputil/databuffer.h
+@@ -6,16 +6,17 @@
+ 
+ #ifndef databuffer_h__
+ #define databuffer_h__
+ 
+ #include <algorithm>
+ #include <cstring>
+ #include <iomanip>
+ #include <iostream>
++#include <cstdint>
+ 
+ namespace nss_test {
+ 
+ class DataBuffer {
+  public:
+   DataBuffer() : data_(nullptr), len_(0) {}
+   DataBuffer(const uint8_t* d, size_t l) : data_(nullptr), len_(0) {
+     Assign(d, l);
+

pkgs/development/libraries/nss/generic.nix

@@ -47,6 +47,11 @@ stdenv.mkDerivation rec {
       ./85_security_load_3.85+.patch
     )
     ./fix-cross-compilation.patch
+  ] ++ lib.optionals (lib.versionOlder version "3.89") [
+    # Backport gcc-13 build fix:
+    #  https://bugzilla.mozilla.org/show_bug.cgi?id=1771273
+    #  https://hg.mozilla.org/projects/nss/raw-rev/21e7aaa1f7d94bca15d997e5b4c2329b32fad21a
+    ./gcc-13-esr.patch
   ];
 
   patchFlags = [ "-p0" ];